Question

the nuber of boys and girls in a class are in the ratio 7:5. the number of boys is 8 more than the number of girls. what is the total class strenth?

Answer 1

the ratio of no. of boys to no. of girls is 7x/5x.
number of boys=8+number of girls
7x=8+5x
7x-5x=8
2x=8
x=4

number of boys=7x=7*4=28
number of girls=5x=5*4=20
total strength=20+28=48.
total strength of the class is 48.

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