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Question

The ratio of number of boys to number of girls in a class is 7:5. If the total number of students are 60 , what will be the number of boys in the class?

A
36
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B
38
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C
35
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D
40
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Solution

The correct option is C 35

Given the ratio of number of boys to number girls of is 7:5.

Let the number boys and girls be 7 ×x and 5 ×x respectively.

Total number of students = 60
7 ×x + 5 ×x = 60
12 ×x = 60
x = 5

Number of boys = 7 ×x
= 7 × 5
= 35


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