Question

a family consists of grandparents, parents and grandchildren's.Theavg age of grandparents is 67,that of the parent is 35 years and that of the grandchildren is 6 years.what is AVG age of the family?

Answer 1

36 is the AVG age of the family

Answer 2

$average = \frac{sum \: of \: observations}{total \: number \: of \: observations} \\ \\ = \frac{67 + 35 + 6}{3} \\ \\ = \frac{108}{3} \\ \\ = 36$
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