Question
Raeann and Ivory's total mass is 36 kg. Ivory and Lynn's total mass is 90 kg. Lynn is four times as heavy as Raeann. What is the average mass of the three friends?
3 m

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Raeann and Ivory's total mass is 36 kg. Ivory and Lynn's total mass is 90 kg. Lynn is four times as heavy as Raeann. What is the average mass of the three friends?