4. A bin of 52 manufactured parts contains 13 defective parts. Pick 8 parts from the...

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4. A bin of 52 manufactured parts contains 13 defective parts.Pick 8 parts from the bin at random (a) without replacement and (b)with replacement. In each case compute the probability that you getno defective parts.

5. A postcode consists of 5 digits of numbers from 1 to 9.Suppose a postcode is valid if it consists of at least two repeateddigits (not real), e.g., 95616 and 96616 are valid but 95617 isnot. Suppose one write a random postcode on a letter. What is theprobability that this postcode is valid

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4aNumber of nondefective parts 52 13 39Number of ways to pick 8 parts from the bin 752538150Number of ways to pick 8 nondefective parts from the 39 bins    See Answer
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