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In a survey of 3116 adults aged 57 through 85 years, it was found that 87.5% of them used at least one prescription medicatio

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Answer #1

Answer: 2727

Explanation:

The number of of subject who used at least one prescription medicine out of 3116 subjects is given by X as:

X = n*p = 3116*0.875 = 2726.5 =2727

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