Mathematics · Average

The mark of a student was wrongly entered as 83 instead of 63. Due to that, the average marks for the class increased by half. Find the number of students in the class.

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173
210
340✓
420

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The mark of a student was wrongly entered as 83 instead of 63. Due to that, the average marks for the class increased by half. Find the number of students in the class.

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The mark of a student was wrongly entered as 83 instead of 63. Due to that, the average marks for the class increased by half. Find the number of students in the class.

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