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1). 23 years2). 24 years3). 26 years4). 27.5 years |
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Answer» Given, Average AGE of 2 GRANDPARENTS = 62 years. Total age of grandparents = Average age × number of grandparents Total age of grandparents = 62 × 2 = 124 years & Average age of 2 PARENTS = 36 years. Total age of parents = average age × number of grandparents Total age of parents = 36 × 2 = 72 years & Average age of 4 kids = 62 years. Total age of kids = Average age × number of kids Total age of kids = 9 × 4 = 36 years Total age of all family members = 124 + 72 + 36 = 232 ⇒ Average age of family = Total of age/Number of people in family ∴ Average age of family = 232/8 = 29 years |
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