3.2.4 problem 19

The pmf of the number of games ending in a draw is $P(X=k)=\left(\frac{n}{k}\right){(0.6)}^k{(0.4)}^{n-k}$ for $0\le k\le n.$

Let $X$ be the number of games that end in draws. The number of players whose games end in draws is $Y=2X$.