Question
The average score received by Sarah, Dana, Lucy and Shiyun in a recent Social Studies test was 82 marks. Sarah and Dana both got 10m marks each while Lucy got half of Shiyun's marks. How many marks did Lucy score for the test? Express your answer in terms of m.
3 m

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The average score received by Sarah, Dana, Lucy and Shiyun in a recent Social Studies test was 82 marks. Sarah and Dana both got 10m marks each while Lucy got half of Shiyun's marks. How many marks did Lucy score for the test? Express your answer in terms of m.