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The total number of students in two classes A and B is 400. The percentage of students in class B is equal to the number of students in class A. If 35% students of class B are girls, then the number of girls in class B is what per cent of the total number of students in class A and B?

The total number of students in two classes A and B is 400. The percentage of students in class B is equal to the number of students in class A. If 35% students of class B are girls, then the number of girls in class B is what per cent of the total number of students in class A and B? Correct Answer 28%

Let the number of students in class A = x

According to the question∶

x + 400 × x/100 = 400

x + 4x = 400

x = 80

The number of students in class B = 400 - 80 = 320

So, the number of girls in class B = 320 × 35/100 = 112

Required percentage = (112/400) × 100 = 28%

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