If x is the proportion of persons who will respond to one, Basic Statistics

If x is the proportion of persons who will respond to one

If X is the proportion of persons who will respond to one kind of mail-order solicitation, Y is the proportion of persons who will respond to another kind of mail-order solicitation, and the joint probability density of X and Y is given by

find the probabilities that

(a) at least 30 percent will respond to the first kind of mail-order solicitation;

(b) at most 50 percent will respond to the second kind of mail-order solicitation given that there has been a 20 percent response to the first kind of mail-order solicitation.

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Basic Statistics: If x is the proportion of persons who will respond to one

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Basic Statistics: If x is the proportion of persons who will respond to one

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