Sir give me the best way to solve the problem of question of class 10th ncert of exercise 14.1 of statistics chapter of question no,8. What is the best way to solve this problem. it is very important for board exams A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent.
Find the midpoint of the given interval using the formula.
Midpoint (xi) = (upper limit + lower limit)/2
The mean formula is,
Mean = x̄ = ∑fixi /∑fi
= 499/40
= 12.48 days
Therefore, the mean number of days a student was absent = 12.48.