Helicobacter
Jul27-10, 06:37 PM
What is the probability that at least X of K people have their birthday in August?
The answer is the obvious binomial c.d.f.:
Sum from i = X to i = K of
Choose(K,i)*(1/12)^i*(11/12)^(K-i)
What if we generalize the problem statement to any month?
What is the probability that at least X of K people have their birthday in the same month?
The answer is the obvious binomial c.d.f.:
Sum from i = X to i = K of
Choose(K,i)*(1/12)^i*(11/12)^(K-i)
What if we generalize the problem statement to any month?
What is the probability that at least X of K people have their birthday in the same month?