A number denoted by x1 is chosen at random from the set of


A number, denoted by X1> is chosen at random from the set of integers {I, 2, 3, 4}. A second number, denoted by X2, is chosen at random from the set {1, 2, ... , X1}.

(i) For each integer k, 1 to 4, find the conditional probability that X2 = 1, given that X1 = k.

(ii) Find the probability that X2 = 1.

(iii) Find the conditional probability that X1 = 2, given that X2 = 1.

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Basic Statistics: A number denoted by x1 is chosen at random from the set of
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