Given X∼Poisson(λ=5)X \sim Poisson(\lambda=5)X∼Poisson(λ=5), which expression correctly represents P(X=1)P(X=1)P(X=1)?
5e−55e^{-5}5e−5
e−5e^{-5}e−5
e−55\frac{e^{-5}}{5}5e−5
1−e−51 - e^{-5}1−e−5