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May I have steps to understand this question please? 22. Assume identical twins are always of the same sex, equally likely boys or girls. Assume

May I have steps to understand this question please?

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22. Assume identical twins are always of the same sex, equally likely boys or girls. Assume that for fraternal twins the firstborn is equally likely to be a boy or a girl, and so is the secondborn, independently of the first. Assume that proportion p of twins are identical and proportion q = 1 -p fraternal. Find formulae in terms of p for the following probabilities for twins: (a) P(both boys) (b) P(firstborn boy and secondborn girl) (c) P(secondborn girl | firstborn boy) (d) P(secondborn girl | firstborn girl) Answer: + + 19N NN AN AN

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