5.Use a tree diagram to explain why the probability that a family with four children all have the same gender is1/18 Assume that the probability of having a girl is equal to the probability of having a boy.(3 marks)

6.In a library box, are 8 novels, 8 biographies, and 8 war history books.If Jack selects two books at random, what is the probability that the two books are of different types?(3 marks)