A pupil's marks were wrongly entered as 67 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 most appropriate option:
A) 30
B) 80
C) 44
D) 25
E) 26
Let there be x pupils in the class.   Total increase in marks = (X*1/2) = X/2.   X/2 = (67 - 45)   =&gt; X/2 = 22   =&gt; X = 44.   ANSWER:44
<result>C</result>
A pupil's marks were wrongly entered as 67 instead of 45. Due to that the average marks for the class got increased by half. The number of pupils in the class is :