Millions of Americans buy lottery tickets each year, even though most people know their chances of winning are slim at best. Why do they bother when taking home the grand prize is less likely than dying in a plane crash or being struck by lightning?
Humans often struggle to grasp probability, especially when guessing the odds of things that could happen in their lives. Generally speaking, this deficiency is due to three very human problem-solving crutches: representativeness, availability, and anchoring.
With representativeness, people base assumptions on similarities or overvalue a small sampling as indicative of a larger truth. Availability is based on recency bias or the assumption that because something just happened, it is more likely to happen again. Anchoring is what people do when they lean too heavily into early reference points, such as going to an expensive store where a discounted article of clothing appears inexpensive in comparison to the initial price despite it still being aggressively inflated.
Stacker took the guesswork out of 50 random events to determine how likely they are to happen, so you don't have to struggle to grasp probability on your own. We sourced our information from government statistics, scientific articles, and other primary documents. Keep reading to find out why expectant parents shouldn't count on due dates—and why you should be more worried about dying on your birthday than living to 100 years old.
Getting struck by lightning
The U.S. Weather Service places a person's odds of being struck by lightning in a given year at 1 in 1,222,000 people, based on population. That probability climbs significantly when looking at the odds of being struck by lightning in a lifetime—1 in 15,300—averaging that lifetime to be 80 years.
Agência Brasil Fotografias // Wikimedia Commons
2 / 50Winning an Olympic medal
The 2026 Winter Olympics in Milan Cortina featured about 2,900 athletes across 116 medal events, with 740 medals handed out in total across individual and team events. That works out to roughly one medal for every four athletes (though some stars took home several, so the share of athletes who reached the podium is a bit lower). When expanding to include the general populace, the odds dwindle substantially—an everyday person with eyes on the gold has a 1 in 662,000 chance of reaching an Olympic podium.
Staselnik // Wikimedia Commons
3 / 50Being killed in a plane crash
Take a deep breath and board that plane with confidence. Commercial aviation remains extraordinarily safe, and the long-term trend is unmistakably in your favor. In 2025, there were 38.7 million flights worldwide and only eight fatal accidents, or roughly one for every 4.8 million flights. Over the last five years, the rate has averaged one fatal accident for every 5.6 million flights, compared to one for every 3.5 million flights a decade earlier.
Total onboard fatalities in 2025 came to 394, up from 244 in 2024. Two crashes accounted for more than 77% of those deaths: Air India Flight 171 in June and PSA Airlines Flight 5342, which collided with an Army helicopter near Washington, D.C., in January. Your overall odds of dying in a commercial plane crash, based on population and average flying rates, remain around 1 in 11 million.
Having twins
You're setting up a nursery and buying a crib, but should you build it for two? In 2024, there were 30.1 twin births for every 1,000 births in the U.S. (about 1 in 33), according to the CDC, an 11% drop from 2014. Identical twins are rarer, occurring in roughly 1 in every 250 natural pregnancies. The odds of having twins increase for older mothers and those receiving fertility treatments. Though there is a gene that makes women more likely to have fraternal twins, men who inherit it are no more likely to have twins in the family, and it doesn't increase the chance of having identical twins.
Will Campbell // Wikimedia Commons
5 / 50Dying in a tornado
Tornadoes killed 67 people in the U.S. in 2025, according to the National Weather Service. With a population of roughly 340 million, that puts the odds of dying in a tornado at about 1 in 5 million in a given year. Those odds go up if you're in a mobile home, live in frequent paths of these storms, or take undue risks when a tornado is nearby.
Winning the lottery
If you're hoping to win the lottery, you're either very lucky or bad at math. Your odds of winning the lottery depend on which game you're playing and, for some games, how many other people are playing. Generally speaking, your odds of winning a prize in Powerball are 1 in 24.87. The odds of winning the jackpot are 1 in 292.2 million. Your chances are about the same for winning the Mega Millions jackpot, which improved slightly to 1 in 290.5 million after the game's April 2025 overhaul. Overall odds of winning any Mega Millions prize are 1 in 23.
Being saved by CPR
More than 350,000 cardiac arrests happen outside of hospitals in the U.S. each year, and only about 9% of patients treated by EMS survive to hospital discharge. But the American Heart Association says immediate CPR can double or triple a person's chance of survival, and only about 40% of victims receive CPR from a bystander. Nearly 3 in 4 of these emergencies (73%) occur in people's homes, making it helpful for all family members, even children with the requisite physical strength, to learn how to administer CPR.
Navicore // Wikimedia Commons
8 / 50Killed by a meteorite impact
Meteorites may be at the heart of many science fiction and disaster films, but when it comes down to real science, Earth is a big planet covered by large, uninhabited areas. Considering the empty versus occupied planetary surface area, you have pretty low-if-wide-ranging odds—between 1 in 3,000 and 1 in 250,000, according to one estimate—of being killed by a meteorite impact.
That said, a 2016 death in India was blamed on a meteorite impact (NASA said it was "unlikely something from space"), and the famous 9-pound "Hodges meteorite" in 1954 made direct contact with Ann Hodges' thigh as she napped on her living room couch.
cygnus921 // Flickr
9 / 50Finding a four-leaf clover
This genetic plant quirk brings the luck of the Irish to just 1 in every 10,000 clovers, says Dr. John Frett, professor of plant and soil sciences at the University of Delaware.
That doesn't mean you won't find one, though: The Guinness World Record for the most four-leaf clovers collected in a single hour goes to Gabriella Gerhardt of Fitchburg, Wisconsin, who, on Sept. 21, 2019, gathered 451.
TravelingOtter // Flickr
10 / 50Getting audited by the IRS
Paying taxes is stressful enough without worrying about getting audited. For individual returns filed for tax year 2021 (the most recent year with near-final figures), the audit rate was about 0.3%, or roughly 1 in 330, according to the agency's 2025 Data Book.
That number masks big swings by income: taxpayers earning between $200,000 and $500,000 faced audit rates of about 0.2%, while those with income above $10 million were audited at a rate of around 6.6%. The IRS has also made a public commitment not to increase audit rates for individuals earning under $400,000, instead directing new enforcement resources toward high-income filers, large corporations, and complex partnerships — a policy outlined in the Treasury Directive following the Inflation Reduction Act. Enforcement capacity has shrunk since then, however: the IRS workforce fell from about 99,600 to roughly 81,000 employees between September 2024 and September 2025.
Gerwin Sturm // Flickr
11 / 50Earning a perfect score on the SAT
Though it won't guarantee college admission, it certainly doesn't hurt to get a perfect score on the SAT. But few manage such a feat: Only 504 of the 1,698,521 students who took the SAT in 2015—0.03%—got every point.
Things didn't get any easier after the test was redesigned in 2016, or after it went fully digital in 2024. Test administrators no longer release precise numbers, but suffice it to say that in the class of 2025, just 7% of the roughly 2 million test-takers scored between 1400 and 1600, with 1600 representing a perfect score.
Getting your car stolen
Car theft had been declining for decades, then surged during the pandemic years, but has recently dropped sharply. There were around 850,708 car thefts in 2024, representing a 17% decrease from 2023—the largest annual decrease in 40 years. That marked a return to pre-pandemic levels after thefts peaked at over 1 million in 2022 and 2023. The slide continued in 2025, when thefts fell another 23% to 659,880, the lowest level in decades.
Seeing your congressperson reelected
While approval ratings jump up and down, there's usually better than a 90% chance a congressional representative running for reelection will be successful. Though the figure dipped to about 85% in 2010, it has rarely gone below 90% since 1974. The reelection rate to Congress in 2024 was 97% nationally, matching the 2022 rate.
Having food poisoning
Listeria, salmonella, E. coli are just a few organisms capable of causing food poisoning. One in 6 Americans will experience food poisoning in a year, according to FoodSafety.gov. Of the 48 million who become ill, 128,000 are hospitalized, and 3,000 die. Foods that are eaten raw and difficult to clean are especially risky.
Will Hart // Flickr
17 / 50Losing something in the mail
Be careful when you address an envelope or a parcel. Of the 88 million lost items the U.S. Postal Service's Mail Recovery Center received in 2014, it was only able to return 2.5 million. That's less than 3%.
While it's impossible to know how many items actually get lost in the mail, averages stand between 3% and 4.7%. Some postal centers host online auctions to sell off unclaimed items.
Airman 1st Class Chris Drzazgowski // U.S. Air Force
19 / 50Becoming a bone marrow donor
Many people sign up for bone marrow registries, but because you need an actual match with a patient to donate, not everyone ends up donating bone marrow. The National Marrow Donor Program (NMDP, formerly known as Be The Match) reports the likelihood of becoming a donor at the time of joining a registry is just 1 in 430.
The U.S. Department of Health and Human Services' Health Resources and Services Administration says only 30% of people who need a bone marrow transplant have a relative who matches them.
Bernard DUPONT // Flickr
20 / 50Dying in a shark attack
Films like "Jaws" and "Sharknado" have primed people to fear shark attacks, but in reality, it's very unlikely to happen. The odds of being killed by a shark are commonly estimated at about 1 in 3.7 million. In 2025, the Florida Museum's International Shark Attack File confirmed 65 unprovoked shark bites worldwide, nine of them fatal. Just one of the 25 unprovoked bites in the U.S. was deadly.
Surfers are most likely to encounter sharks since the best places for catching a wave are also where sharks like to gather.
Patricia Marks // Shutterstock
21 / 50Being named Emma or Jacob
The Social Security Administration gathers and analyzes name data each year, offering tremendous insight into past and present periods. Emma and Jacob rank as the top two most popular baby names of the 21st century, according to SSA data from 2000 to 2019, released in September 2020. Utilizing the Baby Name Uniqueness Analyzer, we found the odds of being named Emma (for girls) or Jacob (for boys) in 2021 stood at 1 in 115 girls and 1 in 222 boys, respectively. By 2025, Emma ranked No. 3 among girls' names with 12,754 babies, while Jacob had slipped to No. 43 for boys, with 6,152.
mike krzeszak // Flickr
22 / 50Having trouble hearing
Half of all adults older than 75 have disabling hearing loss, the National Institute on Deafness and Other Communication Disorders reports. It's not just senior citizens, either: 14% of adults ages 20 to 69 have trouble hearing the frequencies of human voices. Two to three of every 1,000 American children are born with documented hearing loss.
Becoming an astronaut
If you always dreamed of being an astronaut when you grew up, the odds haven't gotten any easier. In 2024, NASA received more than 8,000 applications for its latest astronaut class — and selected just 10 candidates. That's an acceptance rate of about 0.125%, making the odds far more daunting than getting into Harvard.
The 2025 class — the agency's 24th — will spend two years in training before becoming eligible for missions to the International Space Station, the Moon, and eventually Mars.
Dying in a car accident
Your odds of dying in a motor vehicle crash stand statistically higher than most causes of death, at 1 in 101. In 2025, an estimated 36,640 people died in traffic crashes, a decrease of about 6.7% from 39,254 in 2024. That brings roadway deaths back to pre-pandemic levels, and the 2025 fatality rate of 1.10 deaths per 100 million vehicle miles traveled is the second-lowest on record.
Graduating from college within six years
College completion rates vary by school, gender, geography, and a host of other factors. Women are more likely to finish their degrees than men; and at highly selective institutions, more students are likely to finish on time. On average, data show that as many as 6 in 10 students who enroll at two-year community colleges and for-profit, four-year schools will not graduate within six years. Nationally, 61.1% of students who started college in fall 2019 earned a degree or certificate within six years, according to the National Student Clearinghouse Research Center, with full-time students finishing at nearly twice the rate of part-time students (67.1% vs. 34.1%).
vinstock // Shutterstock
26 / 50Needing long-term care insurance
Sam Greenhalgh // Flickr
27 / 50The person next to you being able to read this
Alex Hinds // Shutterstock
28 / 50Being ambidextrous
The odds you can use both hands equally for any task are low: Readers Digest reports that only 1 in every 100 people is ambidextrous. Some people may learn to use their nondominant hand out of convenience or necessity, but that's not the same thing.
Dying in a hurricane
Better hurricane-prediction systems have helped reduce the number of fatalities from storms—most of the nation's deadliest hurricane seasons happened more than 50 years ago. A 1900 hurricane in Galveston, Texas, killed around 8,000 people. The death toll from 2017's hurricanes in Puerto Rico was updated to 2,975 nearly a year after the storms made landfall. Generally speaking, your odds of dying in a hurricane are 1 in 62,288.
HTO // Wikimedia Commons
30 / 50Cracking open a double-yolked egg
The odds of cracking open an egg with a double yolk are about 1 in 1,000, and often come from younger hens. If you crack an egg every day, you're only likely to get a double yolk once every three years. Because the universe can be truly random, you could also end up with an entire carton of double-yolk eggs—like one British man did in 2016.
Spok83 // Shutterstock
32 / 50Being killed by falling furniture
Being injured or killed by unstable furniture falling over is rare: A 2024 Consumer Product Safety Commission report counted 217 deaths from TVs, furniture, and appliances tipping over between January 2013 and July 2023, and 155 of them were children. Most tip-over accidents involve bookshelves, dressers, TVs, and TV stands. Throughout your lifetime, the odds of you being so much as knocked over by falling furniture is 1 in 5,508.
Erik Drost // Wikimedia Commons
33 / 50Playing for a professional sports team
Andrey Arkusha // Shutterstock
34 / 50Steve Johnson // Flickr
36 / 50Someone you know identifies as LGBTQ+
The Supreme Court's 2015 legalization of same-sex marriage was seen as a watershed moment in the movement for equality for LGBTQ+ Americans. In the years since, more people openly identify as LGBTQ+: about 9% of American adults in 2025, according to Gallup surveys, essentially unchanged from 9.3% in 2024. That's more than double the 3.5% Gallup recorded when it first measured LGBTQ+ identification in 2012, and nearly 1 in 4 Gen Z adults now identify as LGBTQ+.
NKM999 // Shutterstock
38 / 50Dying on your birthday
It seems like you should have a 1 in 365—or 366 on a leap year—chance of dying on any particular day of the year. An economist at the University of Chicago discovered this isn't the case. You're 6.7% more likely to die on your birthday, a rate that increases for young people or when birthdays fall on weekends.
Being born with extra fingers or toes
Being born with extra fingers and toes results from a medical condition known as polydactyly, which affects 1 in every 500 to 1,000 births in the United States. But don't worry if it happens to you or your child, as most cases are easily fixed with surgery. People usually end up with one extra finger or toe, but the world record is held by a child born in 2010 in India with 14 fingers and 20 toes.
vchal // Shutterstock
40 / 50Being involved in a mass shooting
Minh Hoang // Flickr
41 / 50Catching a Shiny Pokemon
Shiny Pokemon are no different than normal Pokemon, except they have a different color scheme and are incredibly rare. They appeared in the video game franchise with Pokemon Gold and Pokemon Silver, where players had a 1 in 8,192 chance of finding one. The Pokemon game for Nintendo Switch eases those odds to 1 in 341 after players catch a certain number of a specific species, or 1 in 4,096 without the combo.
That your birth control fails
No birth control is 100% effective, but some are more successful at preventing pregnancy than others. Latex condoms fail 13% of the time, prescription birth control pills fail 7% of the time, and implants like intrauterine devices (IUDs) fail 0.1-0.8% of the time. The right choice depends on the person in question and should always be discussed with your doctor.
Keith Allison // Wikimedia Commons
43 / 50Catching a foul ball
Catching a foul ball during a professional baseball game is any fan's dream. The odds of it happening aren't too terrible, depending on obvious factors like where you're sitting and the pitcher-batter matchup. All in all, there's around a 1 in 835 chance of snagging a ball while rooting for your team. The odds of catching two in a row are closer to 1 in 1 billion.
Being dealt a royal flush
The best hand in poker, a royal flush consists of a 10, jack, queen, king, and ace of the same suit in your hand. There's only a 0.00015% chance of being dealt this and only four possibilities—one of each suit—out of 2.6 million possible poker hands in a normal five-card game.
Bychykhin Olexandr // Shutterstock
45 / 50Being born on leap day
People born on Feb. 29, the extra day added to the calendar every four years to keep calendars matching up with the rotation of the sun, are the subject of fascination and constant jokes about how they only have a birthday every four years. The chances of any person being born on that day are 1 in 1,461, the number of days in four years plus one.
Keeping your wisdom teeth
Getting your wisdom teeth removed has become an adolescent rite of passage, with about 10 million of them removed every year. Despite debates over the necessity of having surgery before the teeth cause problems, around 85% of people who have wisdom teeth—some people are born without them—still get them removed.
freestocks.org // Flickr
48 / 50Giving birth on your due date
Due dates are an inexact science, usually calculated based on a rule devised in the 19th century. Only around 4% of babies are born on their due dates, while 80% are born sometime in the two weeks before or after. Babies born before 37 weeks of pregnancy are considered premature and can suffer from physical disability or developmental delays. An estimated 13.4 million babies were born prematurely in 2020, or more than 1 in 10 worldwide, according to the World Health Organization.
Mark Warner // Flickr
49 / 50Creating a perfect March Madness bracket
nursingschoolsnearme.com/ // Flickr
50 / 50Being born
This would be the probability that started it all, but what are the chances of any one human existing at all? While they're not infinitely small, the odds are not stacked in your favor. Your parents had to meet, you had to be conceived from a specific sperm and egg, you had to be born, and your ancestors had to do the same thing for generations before you or your parents were born.
After all that, you had around a 1 in 10 to the power of 2,685,000 chance, but if you're reading this, you beat those tough odds, so congratulations are in order.