The boys and girls in school are in the ratio of 7:9.if the total strength of the school is 672,find the number of girls

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Solution

Let bys are x
girls are y
Then x/y=7/9..........1

x+y=672
from 1
7y/9+y=672
16y/9=672
y=672×9/16
y=378

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The boys and girls in school are in the ratio of 7:9.if the total strength of the school is 672,find the number of girls

Let bys are x girls are y Then x/y=7/9..........1 ​​ x+y=672 from 1 7y/9+y=672 16y/9=672 y=672×9/16 y=378

Let bys are x
girls are y
Then x/y=7/9..........1

x+y=672
from 1
7y/9+y=672
16y/9=672
y=672×9/16
y=378