Question

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

For the answer to the question above,
The ratio is 2:3

2/5 = part of doctors that do not use brand x aspirin.
3/5 = part of doctors that use brand x aspirin.
2000 = total number of doctors surveyed.

so..

Number of doctors that use brand x aspirin:
3/5 * 2000
= 1200 doctors

Number of doctors that do not use brand x aspirin:
2/5 * 2000
= 800 doctors

So the answer is 1200 doctors.