i. The sum of the number of boys and girls in a school is 150. if the number of boys is x, then the number of girls becomes x% of the total number of students. The number of boys is :

- 60
- 70
- 80
- 90

Answer and Explanation

The Correct answer is : 60

We have : ${(x+\frac{x}{100}\times150)}$= 150

${\frac{5x}{2}}$= 150

x =${ \frac{150\times2}{5}}$ = 60.

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