A is three as old as B. C was twice -as old as A four years ago. In four years time, A will be 31. What are the present ages of B and C?

A 45, 10
B 9,50
C 10,50
D 50,15

Correct Answer: 9,50

Present age of A = 31 - 4 = 27 years " " " B = 273 = 9Four years ago, A's age = 27 - 4 = 23 years "  "  "  " C's   = 23×2 = 26Present age of C  = 46  + 4  = 50 years .'. Present age of B,C = 9,50 
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