If 1.5 x a = 0.04 x b then the value of (b - a) / ( b + a) is ?

• A. None of these
• B. 73/77
• C. 730/77
• D. 73/770

Answer: (B)

a / b = 0.04 / 1.5 = 4 / 150 = 2 / 75∴ Given Exp. (b - a) / ( b + a)= (1- a/b ) / (1 + a/b) = (1- 2 / 75) / (1 + 2 / 75)= ( 73/75 ) / ( 77/75)= 73/77