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Williams Distributors has decided to increase its daily muffin purchases by 100 boxes. A box of muffins costs $4 and sells for $6 through regular stores. Any boxes not sold through regular stores are sold through Dough’s thrift store for $3. Williams assigns the following probabilities to selling additional boxes:
A. $52

B. $152

C. $128

D. $28

答案解析：

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C is corrent. Expected values are calculated as the weighted-average of all possible outcomes using the probabilities of the outcomes as weights. The expected number of additional muffin sales is

A is incorrect. Expected values are calculated as the weighted-average of all possible outcomes using the probabilities of the outcomes as weights. The expected number of additional muffin sales is

A is incorrect. Expected values are calculated as the weighted-average of all possible outcomes using the probabilities of the outcomes as weights. The expected number of additional muffin sales is

A is incorrect. Expected values are calculated as the weighted-average of all possible outcomes using the probabilities of the outcomes as weights. The expected number of additional muffin sales is
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