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Mathematics, 29.05.2020 23:57 pgfrkypory2107
If there are 7 people in a family, 4 grandparents, a grandchild a mom and dad, what is the average age of each person, if all together they are 381 years old?
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If there are 7 people in a family, 4 grandparents, a grandchild a mom and dad, what is the average a...
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