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24-06-2018
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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Porshia Porshia

24-06-2018

This is a proportion problem that involves cross-multiplication
Set your problem up like so:
[tex] \frac{x}{2,000} [/tex] = [tex] \frac{3}{5} [/tex]

Now cross multiply
2,000 x 3 = 6,000
now you're left with 5x = 6,000
Now divide by 5 on both sides
Answer is 1,200

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