In a certain school, the ratio of boys to girls is 5 is to 7. If there are 180 boys and girls in the school, how many boys are there?
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Given:
In a certain school, the ratio of boys to girls is 5 is to 7. If there are 180 boys and girls (students) in the school, how many boys are there?
To find:
how many boys are there?
Solution:
It is given that the ratio of boys to girls is 5 is to 7 and 180 total students.
let the boys are 5x and g irls are 7x.
=> 5x : 7x = 180
=> 5x + 7x = 180
=> 12x = 180
=> x = 180/12
=> x = 15
Number of boys = 5x = 5(15) = 75
Hence, number of boys are 75
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