A pupil's marks were wrongly entered as 73 instead of 65. Due to the average marks for the class got increased by half. The number of pupils in the class is? Choose the correct choice from the following
A) 18 B) 82 C) 16 D) 27 E) 29
Let there be x pupils in the class.   Total increase in marks   = (x * 1/2) = x/2   x/2 = (73 - 65) =&gt; x/2   = 8 =&gt; x = 16.   Answer: 16
<result>C</result>
A pupil's marks were wrongly entered as 73 instead of 65. Due to the average marks for the class got increased by half. The number of pupils in the class is?