Suppose that we randomly choose a group of 100 individuals W

Suppose that we randomly choose a group of 100 individuals. What is the expected number of days in the year with at least one birthday?Suppose that we randomly choose a group of 100 individuals. What is the expected number of days in the year with at least one birthday?

Solution

Given n=100 and p=1/365

So expected number = n*p = 100*(1/365) =0.2739726