Question
The average score received by Fanny, Yen, Abi and Fiona in a recent Chinese test was 77 marks. Fanny and Yen both got 11f marks each while Abi got half of Fiona's marks. How many marks did Abi score for the test? Express your answer in terms of f.
3 m

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The average score received by Fanny, Yen, Abi and Fiona in a recent Chinese test was 77 marks. Fanny and Yen both got 11f marks each while Abi got half of Fiona's marks. How many marks did Abi score for the test? Express your answer in terms of f.