1.

In a class of 21 students the ratio of girl to boys is 4:3 how many girls are there in the class

Answer»

Total number of STUDENTS= 21

Let the RATIO be 4X and 3x

21= 4x + 3x

21= 7x

21/7= x

3= x

So, the number of GIRLS= 3*4 = 12

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