Question
Some pupils took a Math mock exam. Their average score was 72.6 marks. One of the pupils' scores was wrongly recorded as 89 marks instead of 98 marks. As a result, the average score was calculated as 72.1 marks. How many pupils sat for the mock exam?
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Some pupils took a Math mock exam. Their average score was 72.6 marks. One of the pupils' scores was wrongly recorded as 89 marks instead of 98 marks. As a result, the average score was calculated as 72.1 marks. How many pupils sat for the mock exam?