The number of boys and girls in a class

Question:

The number of boys and girls in a class are in the ratio 5 : 4. If the number of boys is 9 more than the number of girls, then number of boys is 9.

Solution:

False

Let the number of boys be 5x and the number of girls be 4x.

According to the question, – 5x – 4x = 9 => x = 9

Hence, number of boys = 5 x 9 = 45

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