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?

Vikas's correct marks = 89

Vikas's incorrect marks = 98

Increase in the average marks = 0.25

Number of students in the class = n (to be determined)

n =  $$\frac{ \text{incorrect marks - correct marks}}{\text{increase in avg. marks}}$$​ 

Number of students =

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