ABC26GN2998 · Ratio and Proportion

Subject: General Aptitude · Chapter: Ratio and Proportion · Exam: · Marks: · Difficulty:

If $A: B=7: 9$ and $B: C=5: 4$, then $A: B: C$ is

(a)$7: 45: 36$

(b)28 : 36 : 35

(c)35 : 45 : 36

(d)None of these

Answer

Answer (as printed): C

Explanation

$A: B=7: 9$ and $B: C=5: 4=\left(5 \times \frac{9}{5}\right):\left(4 \times \frac{9}{5}\right)=9: \frac{36}{5}$. $$\Rightarrow A: B: C=7: 9: \frac{36}{5}=35: 45: 36 .$$

Explanation as extracted from the printed page; notation may be imperfect.

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