Multiple choice

The ratio between the age of a father and a son at present is 5 : 3 respectively four year hence the ratio between the age of the son and his mother well be 1:2 respectively. What is the ratio between the present age of the father and the mother respectively?

  1. 4:5

  2. 3:2

  3. 5:4

  4. Can't be determined

  5. None of these

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

Let father = 5k, son = 3k. After 4 years: son = 3k+4. Son:Mother ratio is 1:2, so Mother = 2(3k+4) = 6k+8. Present Father:Mother ratio = 5k:(6k+8). Without knowing k's value, we cannot determine a numerical ratio. Option D (Can't be determined) is correct.