There are 20 girls and 15 boys in a class.

What is the ratio of the number of girls to the total number of students in the class?

3:4

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4:7

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5:8

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7:9

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Solution

The correct option is B 4:7
Total number of students in a class = 20 + 15 = 35

Ratio of number of girls to the total number of students = 20:35 = $\frac{20}{35}$ = $\frac{4}{7}$ = 4 : 7

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There are 20 girls and 15 boys in a class. What is the ratio of the number of girls to the total number of students in the class?

The correct option is B 4:7Total number of students in a class = 20 + 15 = 35 Ratio of number of girls to the total number of students = 20:35 = 2035 = 47 = 4 : 7

There are 20 girls and 15 boys in a class.

What is the ratio of the number of girls to the total number of students in the class?

The correct option is B 4:7
Total number of students in a class = 20 + 15 = 35

Ratio of number of girls to the total number of students = 20:35 = $\frac{20}{35}$ = $\frac{4}{7}$ = 4 : 7