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14-11-2017
Mathematics

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A survey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand X aspirin. How many doctors use brand X aspirin?

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14-11-2017

[tex]\bf \cfrac{\textit{use X aspirin}}{\textit{don't use X aspirin}}\quad 3:5\qquad \cfrac{3}{5}\qquad \cfrac{3\cdot \frac{2000}{3+5}}{5\cdot \frac{2000}{3+5}}\implies \cfrac{3\cdot 250}{5\cdot 250}\implies \cfrac{750}{1250}[/tex]

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