Question
The average score received by Tammy, Hazel, Shannon and Winnie in a recent Chinese test was 80 marks. Tammy and Hazel both got 11r marks each while Shannon got half of Winnie's marks. How many marks did Shannon score for the test? Express your answer in terms of r.
3 m

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The average score received by Tammy, Hazel, Shannon and Winnie in a recent Chinese test was 80 marks. Tammy and Hazel both got 11r marks each while Shannon got half of Winnie's marks. How many marks did Shannon score for the test? Express your answer in terms of r.