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Suppose that the genders of the three children of a certain family are soon to be revealed. Outcomes are thus triples of girls (g) and
Suppose that the genders of the three children of a certain family are soon to be revealed. Outcomes are thus triples of "girls" (g) and "boys" (b), which we write gbg, bbb, etc. For each outcome, let R be the random variable counting the number of girls in each outcome. For example, if the outcome is ggg, then R (ggg) =3. Suppose that the random variable X is defined in terms of R as follows: X=2R"-2R-4. The values of X are given in the table below. Outcome bbg bbb bgg gbb ggb bgb ggg gbg Value of X -4 -4 0 8 0 D Calculate the values of the probability distribution function of X, i.e. the function p . First, fill in the first row with the values of X. Then fill in the appropriate probabilities in the second row. Value X of X 0 Px (x) 0 0 0 X 5
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