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A family, made up of 2 parents with children, has an average age of 20. If you.........How many kids are in the family?

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A family, made up of 2 parents with children, has an average age of 20.

If you exclude one parent, who is 40, the average age drops to 15.

How many kids are in the family?

posted Jun 15, 2017 by Kuldeep Apte

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1 Answer

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let the number of members be N
20N-40=15(N-1)
gives N=5
thus number of children=3

answer Jun 15, 2017 by Kewal Panesar



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