If the ratio of boys to girls in a class is B and the ratio of girls to boys is G; then 10(B + G) is ?\nOptions:\n(A) Equal to 3\n(B) Less than 3\n(C) More than 10\n(D) Less than 10\n(E) none of these
Let's be accurate as possible. Think before you answer.
(C)
Let number of boys = x\nLet number of girls = y\nTherefore x/y = B and y/x = G\n10(B + G) = 10[(x/y) + (y/x)] = 10[(x2 + y2)/xy] > 10.

The final answer: (C)