The average age of father,mother and son was 41years when the son got married.one year after marriage a baby was born to the son and his wife.five years later the average age of the family was caluculated to be 36years.what was the age of the daughter-in-law at the time of marriage?

• at time of marriage total age: f+m+s+d=41*3+D
  =123+D
  after one year when baby born total avg age= 123+3+1+D=127+D
  
  after 5 year avg of 5 member= 5*5=25
  i.e 25+127+D=36*5
  D=28 yr
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• Ans will be 54
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