Question
The average score received by Lucy, Jean, Tina and Barbara in a recent Mathematics test was 86 marks. Lucy and Jean both got 10f marks each while Tina got half of Barbara's marks. How many marks did Tina score for the test? Express your answer in terms of f.
3 m

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The average score received by Lucy, Jean, Tina and Barbara in a recent Mathematics test was 86 marks. Lucy and Jean both got 10f marks each while Tina got half of Barbara's marks. How many marks did Tina score for the test? Express your answer in terms of f.