Question

the ratio of the number of boys and girl is 9:5.find the number of boys if the total number of student in the class is 42​

Answer 1

Answer:

27

Step-by-step explanation:

Ratio of number of boys to girls = 9 : 5

Let the common ratio be x.

Number of boys = 9x and number of girls = 5x.

Total number of students in the class is 42.

=> 9x + 5x = 42

=> 14x = 42

=> x = 3

Thus,

Number of boys = 27.

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Answer 2

Answer:

let the given ratio = x

9 : 5 = 42

9x + 5x = 42

14 x = 42

x = 42/14

x = 3

Now, the number boys =9x = 9(3) = 27

the number of girls = 5x = 5(3) = 15