Question
The average score received by Anna, Xandra, Diana and Betty in a recent Science test was 97 marks. Anna and Xandra both got 8a marks each while Diana got half of Betty's marks. How many marks did Diana score for the test? Express your answer in terms of a.
3 m

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The average score received by Anna, Xandra, Diana and Betty in a recent Science test was 97 marks. Anna and Xandra both got 8a marks each while Diana got half of Betty's marks. How many marks did Diana score for the test? Express your answer in terms of a.