A sum of ₹312 was divided among 100 boys and girls in such a way that each boy gets ₹3.60 and each girl ₹2.40. The number of girls is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 40.
Let number of boys = x, then girls = 100 - x
Total money:
3.60x + 2.40(100 - x) = 312
⇒ 3.60x + 240 - 2.40x = 312
⇒ (3.60 - 2.40)x = 312 - 240
⇒ 1.20x = 72
⇒ x = 72 / 1.20 = 60
So, girls = 100 - 60 = 40