Suppose that a couple are planning to have 4 children.Suppose that the probability that a child will be a boy is about 0.51 and that a child will be of a particular gender independent of their siblings.we will ignore multiple births since they are very unlikely.they want 3 girls and 1 boy.
a) Find the prob. that they get such a family and the boy is the youngest
b) Find the prob. that they get such a family.