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Statement of a problem № m415

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Eight cavities in an injection-molding tool produce plastic connectors that fall into a common stream. A sample is chosen every several minutes. Assume that the samples are independent. (a) What is the probability that five successive samples were all produced in cavity one of the mold? (b) What is the probability that five successive samples were all produced in the same cavity of the mold? (c) What is the probability that four out of five successive samples were produced in cavity one of the mold?

Solution:
Eight cavities in an injection-molding tool produce plastic connectors that fall

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