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A box consists of 16 components, 6 of which are defective. (a) Components are selected and...

A box consists of 16 components, 6 of which are defective.
(a) Components are selected and tested one at a time, without replacement, until a non-defective component is found. Let X be the number of tests required. Find P(X = 4).
(b) Components are selected and tested, one at a time without replacement, until two consecutive non defective components are obtained. Let X be the number of tests required. Find P(X = 5).
Math   Statistics-And-Probability   
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