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OpenStudy (anonymous):
A survey indicated that 3 out of 5 doctors use brand X aspirin. If 2000 doctors were surveyed, how many used brand X?
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OpenStudy (anonymous):
Whenever you see a set of 5 docs then 3 of them would use this brand. There are 400 sets of 5 docs in 2000 docs so I take 3*400 = ?
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