(a)[1]
State an expression in terms of $e$ for $P(X = 12)$.
(b)[3]
Given that $P(X = n) = P(X = n + 1)$, state an equation in $n$, and hence find the value of $n$.
Mathematics 9709 · AS & A Level · The Poisson distribution
The Poisson distribution — practice question
The random variable $X$ follows the distribution $\text{Po}(15)$.