A: The sum of their ages eight years ago was 56, which means that their present ages are 4 + 7 + 9 = 16 years old. The answer is (B).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:The present ages of three persons are in proportions 4:7:9. Eight years ago, the sum of their ages was 56. Find their present ages. Answer Choices: A)20, 35, 45 B)16, 28, 36 C)8, 20, 28 D)None of these E)30,25,12