A survey was conducted by a group of students as a part of their environment awareness Programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house.
| Number of plants |
0-2 |
2-4 |
4-6 |
6-8 |
8-10 |
10-12 |
12-14 |
| Number of houses |
1 |
2 |
1 |
5 |
6 |
2 |
3 |
Which method did you use for finding the mean and why?
