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1. In a school the ratio of boys to girls is 3 : 7. If there are 150 boys and girls in the school, how many boys are there?
- A. 45
- B. 45
- C. 45
- D. 45
Answer: Option A
Explanation:
let, the number of boys is 3x
and the number of girls is 7x
According to the question,
3x + 7x = 150
or, 10x = 150
or, x = 15
so, the number of boys is (3*15) = 45
ans: 45
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