UPSC Prelims 2026 · CSAT
Question 58: Basic Numeracy
The ratio of male to female workers in two companies A and B is 13 : 10 and 7 : 5, respectively. If both the companies have the same number of female workers, then what is the ratio of the total number of workers in A to those in B?
AnswerUPSC’s answer is (b).
Make the number of female workers equal. Company A has males to females 13 : 10; company B has 7 : 5, which is 14 : 10. With 10 females in each, A has 13 + 10 = 23 workers and B has 14 + 10 = 24 workers, so the ratio of A to B is 23 : 24.
Why each option is right or wrong
- (a) Wrong: 24 : 23 inverts the ratio.
- (b) Right: 23 : 24.
- (c) Wrong: 18 : 17 does not follow from totals of 23 and 24.
- (d) Wrong: 27 : 18 does not follow from the totals.
Only the provisional key (27 May 2026) was found; the final key replaces it when found.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 2026, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.