Mathematics, 17.06.2021 02:00, sonnekaustin60

The oldest child in a family of four children is twice as old as the yougest. The two middle children are 12 and 15 years old. If the average age of the children is 12.75 , how old is the youngest child?

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The oldest child in a family of four children is twice as old as the yougest. The two middle childre...