The sum of the numbers of boys and girls in a school is

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The sum of the numbers of boys and girls in a school is 150. If the number of boys is N, the number of girls becomes N% of the total number of students. The number of boys is :

1. 90
2. 50
3. 40
4. 60

Correct Option: D

According to question

N +	N × 150	= 150
	100

⇒ N +	3	N = 150
	2

⇒ 2N + 3N = 2 × 150 = 300
⇒ 5N = 300 ⇒ N = 60