Mathematics · Average

A pupil's marks were wrongly entered as 83 instead of 63. Due to that, the average marks for the class increased by half. The number of pupils in the class is:

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A pupil's marks were wrongly entered as 83 instead of 63. Due to that, the average marks for the class increased by half. The number of pupils in the class is:

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A pupil's marks were wrongly entered as 83 instead of 63. Due to that, the average marks for the class increased by half. The number of pupils in the class is:

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