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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SSC CGL 2023 Tier-I Official Paper (Held On: 26 Jul 2023 Shift 2)
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  1. 1570
  2. 1580
  3. 1560
  4. 1550

Answer (Detailed Solution Below)

Option 1 : 1570
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Detailed Solution

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Given:

The ratio of the number of boys in a school to the total number of boys and girls in that school is 7 ∶ 17.

The number of boys in that school is 1099,

Calculation:

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 × 10/7 = 1570

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