In a school the ratio of boys to girls is 3 to 7 . If the total student is 150 then how many boys are there?

In a school the ratio of boys to girls is 3 to 7 . If the total student is 150 then how many boys are there? Correct Answer 45

Every 10 total person has 3 boys Every 150 total person has = (3×150)/10 boys = 45 boys
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