Ratio, Proportion

Quantitative Aptitude (CGL)

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The ratio of the number of boys in a school to the total number of boys and girls in that school is 7 : 17. If the number of boys in that school is 1099, then how many girls are there in that school?

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1570

1580

1560

1550

Explanation:

Correct option is 1:1570
Let the number of boys be 7x,
So the total number of girls 17x-7x=10x
As per the question,
The value of 7x = 1099
The value of 10x is 1099 x 10/7 = 1570

By: Parvesh Mehta

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