Question 13


Mr and Mrs Molefe are expecting triplets. You are going to help them to determine the probability of the sexes of their unborn babies. 13.1 Draw up a tree diagram that shows all the possibilities of the sexes of their triplets.


13.2 Use your tree diagram to predict the probability that they will have: 13.2.1 all three babies of the same sex 13.2.2 at least one of each (a girl and a boy) 13.2.3 two boys and one girl.


(2)


(1) (1)


(1) [5]


TOTAL: 100 Marks


362 Section 4: Teaching Mathematics


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