Mathematics, 29.01.2020 03:53, shsbbdDnsgs3913

Adam has two brothers, ben and chris, and one sister, daisy. on any given day, ben calls adam with probability 0.3, chris calls adam with probability 0.4, and daisy calls adam with probability 0.7. let x be the number of siblings that call adam tomorrow.

a)find the moment generating function of x, the number of siblings that call adam tomorrow.

b)assume that all the calls are made independently. calculate the mean and variance of x, the number of siblings that call adam tomorrow.

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