- (a) The random variable \(X\) follows a Poisson distribution with a mean of 1.4
Find \(\mathrm { P } ( X \leq 3 )\).
(b) The random variable \(Y\) follows a binomial distribution such that \(Y \sim \mathrm {~B} ( 20,0.6 )\).
Find \(\mathrm { P } ( Y \leq 12 )\).
(4 marks)