Question

14. The ratio of the number of boys and girls in a school
is 7:13. If there are 400 students in the school, find the
difference of the numbers of girls and boys.
a) 160 b) 140 C) 260 d) 120​

Answer 1

Answer:

d) 120

Step-by-step explanation:

Let number of boys = 7x

Let number of girls = 13x

Total number of students = 400

=> 7x + 13x = 400

=> 20x = 400

=> x = 20.

Number of boys = 7*20 = 140.

Number of girls = 13*20 = 260.

Difference of number of boys and girls = 260 - 140 = 120.

Answer 2

Answer:

260-140=120

Hence answer is yes 20.

Step-by-step explanation:

Let the number of boys be 7x and girls be 13x.

Total students=400.

So ,

7x+13x=400

=20x=400

=x=400/20=

=x=20.

Now,

Number of boys=7x=7×20=140

Number of girls=13x=13×20=260.

So difference=

260―140=120

Hence, your answer is 120.