Question
The average score received by Kimberly, Penelope, Zoe and Fiona in a recent Chinese test was 71 marks. Kimberly and Penelope both got 10s marks each while Zoe got half of Fiona's marks. How many marks did Zoe score for the test? Express your answer in terms of s.
3 m

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The average score received by Kimberly, Penelope, Zoe and Fiona in a recent Chinese test was 71 marks. Kimberly and Penelope both got 10s marks each while Zoe got half of Fiona's marks. How many marks did Zoe score for the test? Express your answer in terms of s.