The present ages of three persons in proportions 5 : 6 : 4. Five years ago, the sum of their ages was 60. Find their present ages (in years).
Choose the correct choice from the following choices:
A) 8, 20, 28
B) 16, 28, 36
C) 25,30,20
D) 18, 24, 32
E) None of these
Explanation:   Let their present ages be 5x, 6x and 4x years respectively.   Then, (5x - 5) + (6x - 5) + (4x - 5) = 60   15x-15 = 60   x = 5   Their present ages are 5x = 25 years, 6x = 30 years and 4x = 20 years respectively.   Answer: 25,30,20
<result>C</result>
The present ages of three persons in proportions 5 : 6 : 4. Five years ago, the sum of their ages was 60. Find their present ages (in years).