While finding the average marks of a class, Vikas's marks were wrongly entered as 98 in place of 89 . Due to this error, the average marks of the class were 0.25 more than the actual average. What is the number of students in the class?

36

Due to error, Difference in the total marks of class will be = 98 - 89= 9

Change in Avg. due the same will be = \(\frac{9}{no.\:of\:student}\) = 0.25

So, No. of students = 9 x 4 = 36