Question: Two samples are received from two dierent suppliers (one from each) and are tested for accept- ability. The probability that sample from rst supplier is

Two samples are received from two dierent suppliers (one from each) and are tested for accept-

ability. The probability that sample from rst supplier is accepted is 0.6, and it is 0.7 for the

second supplier. Let X equal the number of samples that are accepted.

(a) Calculate Pr(X = 1).

(b) Calculate Pr(X 1).

(c) Calculate E(X).

(d) Calculate second moment of X.

(e) Calculate V ar(X).

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