there are [(40 * 39) / 2] separate pairs of people
the probability of two people not having the same birthday is (364 / 365)
the probability that none of the group have the same birthday is
... (364 / 365)^(20 * 39)
Fourty people are selected at random. What is the probability that none of the people in this group have the same birthday?
1 answer
1 answer