Table shows the percentage of doctors and of female doctors in seven cities A to G. Total doctors = 2400; male:female = 5:3.
| City | Doctors (%) | Female Doctors (%) |
|---|---|---|
| A | 19 | 24 |
| B | 21 | 16 |
| C | 9 | 11 |
| D | 12 | 8 |
| E | 17 | 16 |
| F | 14 | 19 |
| G | 8 | 6 |
What is the ratio of the number of female doctors in City D to the number of male doctors in City B?
A2:5
B1:5 ✓ Correct
C3:5
D4:7
Correct answer: (B) 1:5
Explanation
The ratio is 1 to 5, so the answer is 1 to 5.
The female doctors in City D are 8 percent of 900, which is 72.
The total doctors in City B are 21 percent of 2400, which is 504.
The female doctors in City B are 16 percent of 900, which is 144, so the male doctors are 504 minus 144, which is 360.
The ratio is 72 to 360.
Dividing both by 72 gives 1 to 5.
So the ratio is 1 to 5.
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