🧠The Birthday Paradox (23 People in a Room) How many…
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🧠The Birthday Paradox (23 People in a Room)
How many people must be gathered in a room for there to be a 50% chance that at least two share the exact same birthday (day and month)? Guess before reading!
💬 What was your initial guess? 50? 100? 180? Be honest in the comments! (Solution in first comment 👇)
#brain #birthdayparadox #math #counterintuitive #probability
How many people must be gathered in a room for there to be a 50% chance that at least two share the exact same birthday (day and month)? Guess before reading!
💬 What was your initial guess? 50? 100? 180? Be honest in the comments! (Solution in first comment 👇)
#brain #birthdayparadox #math #counterintuitive #probability
| 54,000 mlx | |
| 5 | |
| 1 |
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💡 SCIENCE BEHIND THE ILLUSION:
Only 23 people! Most people guess 182 (half of 365). But we are not comparing everyone to YOU; we are comparing every possible pair. With 23 people, there are (23 × 22) / 2 = 253 unique pairs. The probability that all 253 pairs have different birthdays drops below 50%!
Only 23 people! Most people guess 182 (half of 365). But we are not comparing everyone to YOU; we are comparing every possible pair. With 23 people, there are (23 × 22) / 2 = 253 unique pairs. The probability that all 253 pairs have different birthdays drops below 50%!
