Exams › SSC CGL (Prelims) › General

If P:Q = 5:3, Q:R = 4:7, and R:S = 2:3, find the ratio P:S.

1. 20:63
2. 40:63
3. 35:72
4. 15:28

Correct answer: 40:63

Solution

From P:Q = 5:3 and Q:R = 4:7, make Q common: P:Q = 20:12 and Q:R = 12:21, so P:R = 20:21. Now combine with R:S = 2:3, so P:S = 20/21 × 2/3 = 40:63.

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