Average Practice Test 2

Question : 15 of 40

Marks: +1, -0

A pupil's marks were wrongly entered as 83 instead of 63. Dut to that the average marks for the class got increased by half. What is the number of pupils in the class?

Validate

Solution:

Let the total number of pupils in the class be x; then,

{83-63}/x=1/2

⇒20/x=1/2

⇒x=40

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