Question
Jane and Erika's total mass is 54 kg. Erika and Eva's total mass is 82 kg. Eva is three times as heavy as Jane. What is the average mass of the three friends?
3 m

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Jane and Erika's total mass is 54 kg. Erika and Eva's total mass is 82 kg. Eva is three times as heavy as Jane. What is the average mass of the three friends?