A box contains 4 red balls (R), 3 white balls (W), and 2 black balls (B). Sample two balls from the box with replacement. Let X and Y denote the numbers of R's and W's in the sample respectively. Then Cov(X, Y) = -8/27.

Why this statement is true?

(h) A box contains 4 red balls (R), 3 white balls (W), and 2 black balls (B). Sample two balls from the box with replacement. Let X and Y denote the numbers of R's and W's in the sample respectively. Then Cov(X, Y) = ~8/27. \\/ true ; false