1.

the ratio of the number of boy and girls in a class is 9:5 find the number of boy , if the total number is student in a class is 42

Answer»

Boys : Girls = 9 : 5 Suppose Boys are 9x and girls are 5x Total 42 students. 9x + 5x = 42 14x = 42 x = 3 Number of boys = 9x = 9×3 = 27

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