Banking Exams Quant — Question 1809
Question
The present ages of A and B are in the ratio 5 : 7. After 6 years the ratio becomes 3 : 4. Find A's present age.
- 24 years
- 30 years
- 35 years
- 42 years
Correct answer
B — 30 years
Explanation (English)
Let ages be 5x and 7x. (5x+6)/(7x+6) = 3/4 → 4(5x+6) = 3(7x+6) → 20x + 24 = 21x + 18 → x = 6. A = 5 × 6 = 30 years.
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