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1 10 distinct balls are randomly distributed into 7 distinct boxes For 1 i 7...

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1 10 distinct balls are randomly distributed into 7 distinct boxes For 1 i 7 define 1 if ith box is empty 0 otherwise a Find the probability mass function of X b Find E X for each 1 i 7 c Let X be the number of empty boxes Explain that X X X X7 d Use the expression X X X2 X7 to find E X

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1 10 distinct balls are randomly distributed into 7 distinct boxes For 1 i 7 define 1 if ith box is empty 0 otherwise a Find the probability mass function of X b Find E X for each 1 i 7 c Let X be the number of empty boxes Explain that X X X X7 d Use the expression X X X2 X7 to find E X

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