d) Are A and B indepenident 0.lo O.Ilos 4、 The following is a probability distribution of the number of people placed on hold when they call a radio talk show. O. O.log -44 4 0.36 0.31 0.23 a) Find the probability that at least 2 people are placed on hold. b) Calculate the mean (expected value) of the distribution. ニ11.llo