EXERCISE 3!] A couple is planning on having three children. Assuming that each child is equally liker to he of either sex and that the saxes of the children are independent, nd the probability that all three children will be girls. EXERCISE 28 One bag contains 4 white balls and 2 black balls; another contains 3 white balls and 5 black halls. If one ball is drawn from each bag, nd the probability that A. both are white B. both are black