Before and after the implementation of an economic program to uplift the economic condition of a community following information were found.
| Monthly Income(in Rs. '00) |
Prior to the planNo. of families |
After the planNo. of families |
| 4 - 6 |
10 |
65 |
| 6 - 8 |
70 |
- |
| 8 - 10 |
35 |
37 |
| 10 - 12 |
20 |
15 |
| 12 - 14 |
10 |
15 |
| 14 - 16 |
3 |
5 |
| 16 - 18 |
2 |
5 |
a. Find the highest income of the poorest 40% of the population before and after the plan.
b. Find the lowest income of richest 40% of the population before and after the plan.
c. Obtain the limits of income of middle 50% of families before and after the plan.
