(a) How many ways are there to pick 7 objects out of a set of 25 objects? (b) How many bitstrings of length 25 have exactly 7 1s? (a) How many permutations of the letters ABCDEFGH does there exist? (b) How many permutations of the letters ABCDEFGH contain the string AB? (c) How many permutations of the letters ABCDEFGH contain the strings ABC and HG? Answer:

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A: Given Mean=100 Standard deviation=10

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