Question: Recall our six vacationing couples from Example 3.8. (a) Letting X be the random variable denoting the number of manwoman roommate pairs, compute E[X] and

 Recall our six vacationing couples from Example 3.8.

(a) Letting X be the random variable denoting the number of man–woman roommate pairs, compute E[X] and V (X).

(similar to Ross, 1988, p. 331(44))

(b) Now let X denote the number of husband–wife roommate pairs. Compute E [X] and V (X).

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