Let XXX have the probability density function f(x)=2xf(x) = 2xf(x)=2x for 0≤x≤10 \leq x \leq 10≤x≤1. What is the variance Var(X)Var(X)Var(X)?
1/181/181/18
1/121/121/12
1/91/91/9
1/61/61/6