A random variable XXX has PDF f(x)=2xf(x) = 2xf(x)=2x for 0≤x≤10 \leq x \leq 10≤x≤1. What is the mean E[X]E[X]E[X]?
1/31/31/3
1/21/21/2
2/32/32/3
3/43/43/4