2-113. A batch of 30 injection-molded that have suffered excessive shrinkage. parts contains 6 parts (a) If two parts are selected at random, and without replace- ment, what is the probability that the second part selected is one with excessive shrinkage? (b) If three parts are selected at random, and without replace- ment, what is the probability that the third part selected is one with excessive shrinkage?

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