Question
The average score received by Gem, Esther, Marion and Anna in a recent History test was 77 marks. Gem and Esther both got 8k marks each while Marion got half of Anna's marks. How many marks did Marion score for the test? Express your answer in terms of k.
3 m

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The average score received by Gem, Esther, Marion and Anna in a recent History test was 77 marks. Gem and Esther both got 8k marks each while Marion got half of Anna's marks. How many marks did Marion score for the test? Express your answer in terms of k.