You walk into a room with 3 other people in it. What is the probability that one or more of them has a birthday in the same month as yours?

Question

Probability

Answer 1

The probability that 3 people have different birth months than you is (11*11*11)/(12*12*12)=1331/1728.

S0 1-1331/1728 represents the probability that not all of them have a different month than you....so 397/1728 should be your answer.....I think.

 

Hope this helped