Question

A student's marks were wrongly entered as 83 instead of 63. due to that the average marks for the class got increased by half. the number of students in the class are:

Answer 1

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чσur quєѕtíσn:

A student's marks were wrongly entered as 83 instead of 63. due to that the average marks for the class got increased by half. the number of students in the class are

αnѕwєr:

Given;

Let,
the total number of students in the class be x

The average marks increased by ½ 
due to an increase of
83 - 63 = 20 marks.

total increase in the marks
= ½ * x = x/2

Hence it can also be written as

X/2 =20
X= 20x2
=40

Therefore tge total number of students present in class is 40 members......


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