# Thumbtack Problem

(a) If $X$ is the number of times the thumbtack lands up, $X$ can be said to follow a $Bin(5,0.6)$ distribution. Calculate $P(X=2)$ from this.
(b) Calculate $P(X\geq 2)$
(c) If $X\sim Bin(n,p)$ , $E(X)=np$ , $Var(X)=np(1-p)$.....