🎉 Shared birthday (23 people) vs 💰 Winning Mega Millions jackpot
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You're 151.3 million× more likely to share a birthday in a group of 23
than to win Mega Millions
Periods differ: Shared birthday (23 people) is framed as group of 23 people, while Winning Mega Millions jackpot is per ticket. The multiplier is a raw ratio of the 1-in-X figures — not a normalized lifetime risk. Compare cautiously.
Shared birthday (23 people)
~50.7% (about 1 in 2)
group of 23 people
Winning Mega Millions jackpot
1 in 302,575,350
per ticket
How we calculated this
Each figure is “1 in X.” The larger X is the rarer event. Dividing that number by the more common one gives the multiplier: you're 151.3 million× more likely to share a birthday in a group of 23. When the periods differ, this is a raw ratio of those figures, not a lifetime-normalized risk.
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You're 151.3 million× more likely to share a birthday in a group of 23 (~50.7% (about 1 in 2), group of 23 people) than to win Mega Millions (1 in 302,575,350, per ticket). ⚠️ Periods differ (group of 23 people vs per ticket) — compare cautiously. — How Likely Is That? https://www.howlikelyisthat.com/compare/birthday-paradox-odds-vs-odds-of-winning-mega-millions
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