Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 years old girl, and they had a baby boy last year. what is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.
a) 40
b) 42.5
c) 36.5
d) 34
e) 35.8

1 Answer

Answer :

Four years ago, sum of all the family members age = 4× 40 = 160
three years ago, sum of all the family members age = 164 + 23 = 187
last year, sum = 197 (187 + 5 + 5)
two years from now, sum = 197 + 18 = 215
hence, average = 215/6 = 35.8
Answer: e)

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