Question
A group of 6 pupils scores an average of 84 marks in a test. When a new pupil joins the group, their average score decreases to 77 marks. How many marks does the new pupil score?
2 m

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A group of 6 pupils scores an average of 84 marks in a test. When a new pupil joins the group, their average score decreases to 77 marks. How many marks does the new pupil score?