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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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