Question
The average score received by Risa, Linda, Diana and Sarah in a recent Mathematics test was 65 marks. Risa and Linda both got 8m marks each while Diana got half of Sarah's marks. How many marks did Diana score for the test? Express your answer in terms of m.
3 m

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The average score received by Risa, Linda, Diana and Sarah in a recent Mathematics test was 65 marks. Risa and Linda both got 8m marks each while Diana got half of Sarah's marks. How many marks did Diana score for the test? Express your answer in terms of m.