In a college union, there are 48 students. The ratio of the number of boys to the number of girls is 5 : 3. The number of girls to be added in the union, so that the number of boys to girls in 6 : 5, is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 7.
Number of boys = 48 × 5/8 = 30
Number of girls = 48 – 30 = 18
So,
30/(18 + x) = 6 : 5
⇒ 108 + 6x = 150
⇒ 6x = 42
⇒ x = 7
Hence, 7 girls should be added.