If P(X=1)=0.7P(X=1) = 0.7P(X=1)=0.7 and P(X=0)=0.3P(X=0) = 0.3P(X=0)=0.3, what is E[X2]E[X^2]E[X2]?
0.3
0.7
0.49
1