Question
Jade and Zoe's total mass is 30 kg. Zoe and Abi's total mass is 68 kg. Abi is three times as heavy as Jade. What is the average mass of the three friends?
3 m

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Jade and Zoe's total mass is 30 kg. Zoe and Abi's total mass is 68 kg. Abi is three times as heavy as Jade. What is the average mass of the three friends?