If A : B : C = 1 : 4 : 7 and B = (2x)% of (A + C), then x is:

12 25 30 45

25

A : B : C = 1 : 4 : 7 Also, B = (2x)% of (A + C) A:B:C = x/12 : 4x/12 : 7x/12 4x/12 = (2x)% of (x/12 + 7x/12) 4x/12 = (2x)% of (8x/12) (2x)% = 1/2 (2x)/100 = 1/2 2x = 50 The correct answer is Option (2) → 25