Multiple choice

The average age of father, son and mother is 42 years. 12 years ago their ages were in the ratio 7 : 2 : 6. Then find the present age of mother.

  1. 36

  2. 48

  3. 24

  4. 18

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total present age = 3 × 42 = 126 years. Let ages 12 years ago be 7x, 2x, 6x (father:son:mother). Present ages are 7x+12, 2x+12, 6x+12. Their sum = 15x+36 = 126, so x=6. Mother's present age = 6x+12 = 48 years. Option A (36) would make mother younger than the calculated age. Option C (24) is too small for a mother in this family.