A pupil's marks were wrongly entered as 73 instead of 45. Due to that the average marks for the class got increased by half. The number of pupils in the class is :	Choose the correct choice
A) 56
B) 80
C) 20
D) 25
E) 26
Let there be x pupils in the class.   Total increase in marks = (X*1/2) = X/2.   X/2 = (73 - 45)   =&gt; X/2 = 28   =&gt; X = 56.   56NSWER:56
<result>A</result>
A pupil's marks were wrongly entered as 73 instead of 45. Due to that the average marks for the class got increased by half. The number of pupils in the class is :