Average Practice Test 2

Question : 31 of 40

Marks: +1, -0

Soni's teacher wrongly entered her marks as 94 instead of 74. Due to this, the average marks for the class got increased by half. The number of pupils in the class is:

Validate

Solution:

Let there be x pupils in the class.
Total increase in marks

=x×1/2=x/2

∴x/2=94-74=20

∴x=40

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