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.

Explanation

To find the mean number of days a student was absent based on the absentee record of 40 students, we will follow these steps:

### Step 1: Organize the Data
First, we need to organize the absentee data into a frequency distribution table. We will create intervals for the number of days absent and count how many students fall into each interval.

| Days Absent (Interval) | Frequency (f) |
|------------------------|---------------|
| 0 - 6 | 11 |
...