If the Psychology professors in the University constitute 2% of all the professors in the University, then what is the number of professors in the University ?
a400
b500
c600
d700
AnswerUPSC’s answer is (b).
In Figure 1, Psychology has 4 male and 6 female professors, which makes 10. If these 10 form 2 per cent of all professors in the University, the total is 10 divided by 0.02, which is 500. A quick check: 2 per cent of 500 is 10, which matches the number of Psychology professors.
Why each option is right or wrong
(a) Wrong. 10 is 2.5 per cent of 400.
(b) Right. 10 is 2 per cent of 500.
(c) Wrong. 10 is under 2 per cent of 600.
(d) Wrong. 10 is about 1.4 per cent of 700.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
