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.
