A student's marks were wrongly entered as 65 instead of 45. Due to this, the average marks for the class got increased by 1/3. The number of students in the class is:

60

Let no. of students in class be x

Average marks of class got increased by 1/3

so, increase in total marks = x × \(\frac{1}{3}\) = \(\frac{x}{3}\)

∴ \(\frac{x}{3}\) = 65 - 45

⇒ x = 60