15. 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? (Hint: Solve for X).
800 doctors used brand X aspirin, to get the answer you divide 3 by 5 then you get 0.6. You then times 0.6 by 2000 and get 1200 the you subtract 2000 by 1200 and get 800.
