Subject: General Aptitude · Chapter: Ratio and Proportion · Exam: · Marks: · Difficulty:
Given that 24 carat gold is pure gold; 18 carat gold is $\frac{3}{4}$ gold and 20 carat gold is $\frac{5}{6}$ gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is
(a)5 : 8
(b)8 : 5
(c)9 : 10
(d)15 : 22
Answer
Answer (as printed): C
Explanation
Required ratio $=\frac{3}{4} x: \frac{5}{6} x=\frac{3}{4}: \frac{5}{6}=9: 10$.
Explanation as extracted from the printed page; notation may be imperfect.