Let X∼Binomial(n=8,p=0.5)X \sim \text{Binomial}(n=8, p=0.5)X∼Binomial(n=8,p=0.5). What is P(X≤1)P(X \leq 1)P(X≤1)?
9/2569/2569/256
1/321/321/32
5/1285/1285/128
1/161/161/16