A discrete random variable XXX has PMF P(X=k)=14P(X=k) = \frac{1}{4}P(X=k)=41 for k=1,2,3,4k = 1, 2, 3, 4k=1,2,3,4. What is Var(X)Var(X)Var(X)?
1.01.01.0
1.251.251.25
1.51.51.5
2.02.02.0