The average age of a husband and his wife was 23 years at the time of their marriage.After five years they have a one year old child.The average age of the family now is
A. 19 years
B. 23 years
C. 28.5 years
D. 29.3 years

• Ans: A
  (h+w)/2 = 23 --> h+w = 46
  after five years
  H+W + C = 46+10+1 = 57
  average age of family = 57/3 = 19
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