If the ratio of boys to girls in a class is 3:4 and the total number of students is 56, how many boys are there?
Let the number of boys = 3x and girls = 4x. Total = 3x + 4x = 56 => 7x = 56 => x = 8. Thus, boys = 3x = 3*8 = 24. Correct answer: b) 24
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