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Find the probability that the number making a purchase

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Reference no: EM132852652

The manager of a discount department store has determined that 50% of the persons entering the store make a purchase. In a random sample of 20 persons entering the store, find the probability that the number making a purchase is

a. 10 or more.

b. 7 or fewer.

c. between 5 and 9, inclusive.

Reference no: EM132852652

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