Question

The ratio of boys and girls in a school is 7:5. If the total number of students in the school is 480, find
the number of boys.​

Answer 1

Answer:

see below

Step-by-step explanation:

GIVEN :-

The ratio of boys and girls in a school = 7:5

Total number of students in the school = 480

LET,

• Number of boys = 7x
• Number of girls = 5x

===> 7x + 5x = 480

===> 12x = 480

===> x = 480 / 12

===> x = 40

:. Number of boys = 7x = 7 × 40 ===> 280

:. Number of girls = 5x = 5 × 40 ===> 200

HENCE,

• Number of boys = 280

Answer 2

Answer:

GIVEN :-

The ratio of boys and girls in a school = 7:5

Total number of students in the school = 480

LET,

Number of boys = 7x

Number of girls = 5x

===> 7x + 5x = 480

===> 12x = 480

===> x = 480 / 12

===> x = 40

:. Number of boys = 7x = 7 × 40 ===> 280

:. Number of girls = 5x = 5 × 40 ===> 200

HENCE,

Number of boys = 280

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