three year ago the average age of a family was 27 years. the present average age is also 27 years after the including of a child into the family. find the age of the child
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3years ago average age of family = 27
parents age = 27 x 2 = 54
Current parents age = 54 + 6 = 60
Current age average including child = 27
father + mother + child = 27 x 3 = 81
60 + child = 81
child = 81 - 60 = 21 years old
littyissacpe8b60:
Sorry it should be 21
hey your question is incomplete. it was 5 family members which you left. Where is 5 in your question?
a family of 5 is 27. Where did it go?
Now how will I edit it
I will tell here
average of 5 family members = 27. so total age = 27 x 5 = 135
Now after 3 years = 135 + 15 = 150
Average of family = (Family + child)/6 = 27
150 + child = 27 x 6
Child = 162 - 150 = 12years old
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