The ratio of the number of boys and girls in a school of 720 students is 7 : 5. How many more girls should be admitted to make the ratio 1 : 1?
90
120
220
240

Question

The ratio of the number of boys and girls in a school of 720 students is 7 : 5. How many more girls should be admitted to make the ratio 1 : 1? 1. 90 2. 120 3. 220 4. 240

KnowledgeBoat · Accepted Answer

Given,

The total number of students is 720.

The initial ratio of boys (B) to girls (G) is 7 : 5.

The total number of ratio parts is 7 + 5 = 12.

Initial number of boys = $\dfrac{7}{12} \times 720$ = 420.

Initial number of girls = $\dfrac{5}{12} \times 720$ = 300.

In order to make the ratio 1 : 1, the number of girls and boys must be equal.

Thus, 420 - 300 = 120, more girls should be admitted.

Hence, option 2 is the correct option.

Mathematics

The ratio of the number of boys and girls in a school of 720 students is 7 : 5. How many more girls should be admitted to make the ratio 1 : 1?
90
120
220
240

Ratio Proportion

Answer

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If a sum of ₹ x is divided between A and B in the ratio $\dfrac{a}{b} : \dfrac{c}{d}$ , then A gets:
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Mathematics

The ratio of the number of boys and girls in a school of 720 students is 7 : 5. How many more girls should be admitted to make the ratio 1 : 1?90120220240

Ratio Proportion

Answer

Related Questions

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The ratio of the number of boys and girls in a school of 720 students is 7 : 5. How many more girls should be admitted to make the ratio 1 : 1?
90
120
220
240

A sum of ₹ 6,400 is divided among three workers in the ratio $\dfrac{3}{5} : 2 : \dfrac{5}{3}$ . The share of the second worker is :
₹ 2,560
₹ 3,000
₹ 3,200
₹ 3,840

Two numbers are in the ratio 7 : 11. If 7 is added to each of the numbers, the ratio becomes 2 : 3. The smaller number is:
39
49
66
77

What must be subtracted from each of 7, 9, 11 and 15, so that the resulting numbers are in proportion?
1
2
3
5