Question

4.
A survey indicated that 3 out of 5 doctors use brand X aspirin.

If 2000 doctors were surveyed, how many used brand X?

Answer 1

set up a proportion

Answer 2

say, \(a\) number of doctors used bran X, then :-

\(\large \frac{3}{5} = \frac{a}{2000}\)

Answer 3

cross multiply, solve \(a\)

Answer 4

1200

Answer 5

Yes ! good work !!