Find the expected value of the random variable. 4 5 P(x) 0.3 0.2 0.1 0.4 What is the expected value? (Type an integer or a decimal.) Find the expected value for the random variable. 15 18 12 21 0.40 0.13 0.24 0.17 0.06 P(z) E(Z) =(Type an integer or a decimal.) %3D