sanju09 wrote:The average age of a husband and wife at the time of their marriages was 25 years. A son was born to them two years after their marriage. The present average age of all three of them is 24 years. How many years is it since the couple got married?
(A) 5
(B) 6
(C) 7
(D) 8
(E) 9

ajith wrote:

sanju09 wrote:The average age of a husband and wife at the time of their marriages was 25 years. A son was born to them two years after their marriage. The present average age of all three of them is 24 years. How many years is it since the couple got married?
(A) 5
(B) 6
(C) 7
(D) 8
(E) 9

Say it is n years since the couple got married

The sum of ages when the couple got married = 25*2 = 50

The sum of ages of the couple and the kid now = 24*3 = 72 = 50+ 2*n + n-2
=> 3n = 24; n =8

ace_gre wrote:I arrived at the same answer ==>8.

h+w = 25*2 = 50
when son was born after 2 yrs, h+w = 54

now h + w +s = 24*3=72

72-54 = 18 = years of h , w and s *3==>6 yrs. so total is 6+2==>8.

Ajith has done it well algebraically