Marks of a student were wrongly entered in computer as 83, actual marks of that student were 63. Due to this mistake average marks of whole class got increased by half (1/2). Find the total number of students in that class. Answers
A) 25  B) 30  C) 35  D) 40  E) 45
Explanation:   Suppose total number of students are = X   Totalincrease=x∗1/2=x/2   =&gt;x/2=83−63=20   =&gt;x=40   Answer: Option 40
<result>D</result>
Marks of a student were wrongly entered in computer as 83, actual marks of that student were 63. Due to this mistake average marks of whole class got increased by half (1/2). Find the total number of students in that class.