Question

Find the compound ratio of 4: 5, 6:7 and 15:8.

• A. 3:4
• B. 9:6
• C. 9:7
• D. 9:1

Answer 1

The correct option is C

9:7

A compound or mixed ratio is defined as the ratio whose antecedent is the product of the antecedents of two or more simple ratios and its consequent is the product of the consequents of those ratios.

$\therefore \text{The required compound ratio}=\frac{4\times 6\times 15}{5\times 7\times 8}=\frac{9}{7}=9:7$