In a class the ratio of boys and girls was 7 to 3. If there were 210 girls in the class, what was the number of boys in the class ?
Created: 7 months ago | Updated: 1 month ago
Job Solution Bangladesh Bank Bangladesh Bank - Officer(Cash) - 2011 গণিত
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The ratio of boys and girls is 7 : 3.

Let,

The number of boys is 7x and the number of girls is 3x.

According to the question, 

3x = 210 

so, x = 70.

So, the number of boys is = 7x 

                                                = 7 × 70

                                                =490.

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