Problem 12. The probability distribution of X, the number of pin-striped suits brought on this trip, has expected value E{X} = ____ and variance σ²{X} = _____.(A) 1.5； 0.667(B) 1.5； 0.571(C) 1.0； 0.667(D) 1.0； 0.571(E) None of the above