in a class the ratio of the numbers of boys to that of the girls is 4:3 . if there is 20 more boys and 12 less girls then the ratio would have been 2:1. hiw many students were there in the class.?
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Let no. og boys be 4x and girls be 3x
Given, (4x+20) / (3x-12) = 2/1
2x + 10 = 3x - 12
x = 22
Total no of students = 4x + 3x = 7*22 = 154
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