Question

The compounded ratio of (1 ∶ 3), (6 ∶ 5) and (7 ∶10) is:
1. 7/30
2. 7/23
3. 7/25
4. 7/22

Answer 1

Correct Answer - Option 3 : 7/25

Formula used:

For ratios m : n, p : q and r : s the compound ratio is (m × p × r) : (n × q × s) 

Calculation:

According to the question:

Compound Ratio = (m × p × r) : (n × q × s) 

(1 × 6 × 7) : (3 × 5 × 10) = 42 : 150 = 7 : 25

∴ The compounded ratio of the ratios (1 ∶ 3), (6 ∶ 5) and (7 ∶10) is (7 : 25).