Question

A pupil’s marks were wrongly entered as 85 instead of 75. Due to that the average marks for the class got increased by one-third (1/3). The number of pupils in the class is

Answer 1

Answer:

30

Step-by-step explanation:

Let there be x pupils in the class.

Total increase in marks = (x * 1/3) = x/3.

x/3 = (85 - 75)

=> x/3 = 10 =>

x = 10 * 3

x = 30

Mark me brainliest :)