SOLUTION: For a group of 40 people, what is the probability that exactly three people in the group will celebrate their birthdays on a Wednesday this year

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Question 306869: For a group of 40 people, what is the probability that exactly three people in the group will celebrate their birthdays on a Wednesday this year
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
this is a binomial problem ___ probability of Wed is 1/7 ___ probability of not Wed is 6/7

for 3 people out of 40 ___ p = (40C3)[(1/7)^3][(6/7)^37]