Question

g Two balls are dropped in such a way that each ball is equally likely to fall into any one of four holes. Both balls may fall into the same hole. Let X denote the number of unoccupied holes at the end of the experiment. What is Var X  ?

Answer 1

0.5

Explanation:

X=[3,2]

mean= 5/2

(X-μ)²= [0.25, 0.25]

Var X =Σ (X-μ)²/(n-1)

Var X = (0.25+0.25)/(2-1)

Var X = 0.5