12 years ago M was half of N in age. If the ratio of their present ages is 4 : 5, what will be the total of their present ages? (A) 30 (B) 32 (C) 35 (D) 36►Correct Option Correct Option is: DLet M’s age 12 years ago = x years. Then, N’s age 12 years ago = 2x years. (x + 12) / (2x+ l2) = 4/5 => x = 4. So, the total of their present ages =(x + 12 + 2x + 12) = (3x + 24) = 36 years.