the size of the class does not matter. Assuming a random population,
P(April)=P(Oct) = 1/12
P of 3 students all in same month is thus (1/12)^3
Given two months, p is twice that.
so, the probability here is 2*(1/12)^3
A graduate class consist of six students. what is the probability that exactly three of then are born in either in april or in october?
1 answer