Question

. The ratio of boys to girls in a school is 9:4. If the number of girls is 1800, find the number of boys.

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Answer 1

Answer:

Let the number of girls =x

Girls:Boys =9:11

No. of boys =2035

x:2035=9:11

$$\Rightarrow \dfrac{x}{2035} = \dfrac{9}

{11} \Rightarrow 11 \times x=9 \times 2035$$

$$\Rightarrow x=\dfrac{9 \times 2035}{11} =

9 \times 185 \Rightarrow x=1665$$

No, of girls =1665

Total student in school = no. of boys + No, of girls

2035+1665=3700

Answer 2

Answer:

2450 boys..

Step-by-step explanation:

Let the number of boys in the school be

as given in the question that there are 1800 girls in the school and the ratio of number of boys and girls is 9:4

so,

• x:1800 = 9:4

•    x   =  9

       1800     4

• x = 9 x 1800

                   4

• x = 9 x 450
• x = 2450

hence there are 2450 number of boys in the school

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