Question

the total strength of a school is 1120. the ratio of number of girls to to number of boys is is 3:4. find the number of girls and number of boys​

Answer 1

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Given:

Total strength of a school is 1,120.

The ratio of boys and girls in the school is 4: 3

To find :

The number of boys and the number of girls in the school.

Let's solve,

Let the number of girls are 4xx and the

number of boys are 3xx

So,

Number of girls + Number of boys = Total strength of school

4xx + 3xx = 1,120

7xx = 1,120

x=\dfrac{1,120}{7}x=

7

1,120

xx = 160

∴ Number of boys = 4 xx = 4 × 160 = 640

and number of girls = 3 xx = 3 × 160 = 480

Answer 2

Step-by-step explanation:

total strength of a school =1120

the ratio of number of girls to to number of boys = 3:4

no of girls =3/7×1120= 3×160= 480

no of boys = 4/7×1120= 4×160= 640

so no of boys = 640,no if girls = 480