Question

The ratio of number of girls to boys in a school of 4500 students is 49:51. How many more girls should

be admitted to make the ratio 1:1?​

Answer 1

Question:

____________

The ratio of number of girls to boys in a school of 4500 students is 49:51. How many more girls should

be admitted to make the ratio 1:1?

Answer:

__________

90

Explanation:

_______________

Total number of students = 4500

Ratio of girls to boys = 49:51

So,

Sum of the ratios = 49 + 51 = 100

This means that the ratios are in %

Now,

Number of girls = 49 % of 4500

= 49/100 × 4500

= 2205

And,

Number of boys = 51 % of 4500

= 51/100 × 4500

= 2295

Then,

To make ratio 1:1, the number of girls & boys

should be equal .

Therefore,

Difference in the number of boys and girls

= 2295 - 2205

= 90

Then,

90 girls must be admitted to make ratio 1:1.

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