If 5 : a:: 20: 28, then a is equal to · ABC26GN2974

Subject: General Aptitude · Chapter: Ratio and Proportion

If 5 : $a:: 20: 28$, then $a$ is equal to

(a)4

(b)6

(c)7

(d)8

Answer

Answer (as printed): C

Explanation

$5: a:: 20: 28 \Leftrightarrow 20 a=5 \times 28 \Leftrightarrow a=\frac{5 \times 28}{20}=7$.

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

Study loop for Ratio and Proportion