How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?
ANSWER: Only twenty-three people need be in the room, a surprisingly small number. The probability that there will not be two matching birthdays is then, ignoring leap years, 365x364x363x…x343/365 over 23 which is approximately 0.493. this is less than half, and therefore the probability that a pair occurs is greater than 50-50. With as few as fourteen people in the room the chances are better than 50-50 that a pair will have birthdays on the same day or on consecutive days.
CONGRATS to Becky Scott of Dresden, she was the first to correctly answer “23″ … she wins our goodie bag filled with stuff for the whole family!
Congratulations to last week’s winner, Emmett Jones!
Rules to play are simple: You cannot have won anything from the Thunderbolt Broadcasting stations in the past 30 days. The winner’s name will be announced on the air, on our Facebook page, and the winner will receive an e-mail from us. Additionally, you may check back here to find out if you were the first one to correctly guess the answer!
Please try back next Friday for another great question! Have a great weekend (and upcoming week)!