Saturday, February 10, 2007

one of my math questions :)...

A math professor points out to her class of 20 that the probability of two people in the class having the same birthday is about 0.4 . A student raises her hand and states that she is certain that there will be a birthday match. She knows no one's birthday except her own. Explain why she was able to make this statement with such certainty.

3 comments:

Ivory said...

She must have been born on Christmas...and Jesus was in her class. :D

meeka said...

okay the answer was.... there were twins in the class!!

Mario said...

oh, I was going to say that certainly there would be a birthday match-there would be one for each birthday. you know to light the candles on the cake?