1. Suppose that the monthly worldwide average of airplane crashes of commercial planes is 2.0.
(a) What is the probability of exactly 6 crashes in the first 3 months?
(b) What is the probability of having exactly 2 crashes in each of the first two months?
(c) What is the probability of having exactly 2 crashes in the each of the first two months, given that there are exactly 6 crashes in the first 3 months?