Question
After an examination, David and his friends calculated their average score. They figured that if David could get 19 marks more, they would have an average of 91. However, if David's results were 5 marks less, their average would become 87. How many friends did David have?
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After an examination, David and his friends calculated their average score. They figured that if David could get 19 marks more, they would have an average of 91. However, if David's results were 5 marks less, their average would become 87. How many friends did David have?