SOLUTION: There are 30 people in a room. What is the probability that at least two of these people have the same birthday - that is, have their birthdays on the same day and month?
Algebra.Com
Question 871199: There are 30 people in a room. What is the probability that at least two of these people have the same birthday - that is, have their birthdays on the same day and month?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
p(same birthday) = 1/365, n = 30
P(x ≥ 2) = 1 - binomcdf(30, .0027, 1)= .003
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