SSC GD Constable 2021 · Question 153 of 377

If the ratio P ∶ Q = 2 ∶ 3, and Q ∶ R = 3 ∶ 4 then the ratio P + Q ∶ Q + R is:

ratio-proportion

A5 ∶ 7Correct
B7 ∶ 5
C7 ∶ 9
D9 ∶ 7

Answer: A. 5 ∶ 7

Explanation

Given: The ratio P ∶ Q = 2 ∶ 3, and Q ∶ R = 3 ∶ 4 Calculation: P:Q=2:3 Q:R=3:4 So, P : Q : R = 2 : 3 : 4 Now, P + Q ∶ Q + R = (2 + 3) : (3 + 4) ⇒5:7 ∴ The ratio P + Q ∶ Q + R is 5 : 7.

Source: SSC GD Constable 2021 Prev. Year Paper (2021-11-23 Shift 1) English — Prepp (with solutions) · reliable-secondary

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