Question

Mark (✓) against the correct answer
If a : b = 3 : 4 and b : c = 8 : 9, then a : c = ?

(a) 1 : 2
(b) 3 : 2
(c) 1 : 3
(d) 2 : 3

Answer 1

The correct option is (d).


$$\begin{gathered} \frac{a}{c}=\frac{a}{b}\times \frac{b}{c}=\frac{3}{4}\times \frac{8}{9} \\ =\frac{2}{3} \end{gathered}$$

Hence, a : c = 2 : 3