The following table shows the funds collected by 50 students for flood affected people. Find the mean of the funds.
Fund (Rs.) |
0 - 500 |
500 - 1000 |
1000 - 1500 |
1500 - 2000 |
2000 - 2500 |
2500 - 3000 |
No. of students |
2 |
4 |
24 |
18 |
1 |
1 |
If the number of scores in two consecutive classes is very low, it is convenient to club them. So, in the above example, we club the classes 0 – 500, 500 – 1000 and 2000 – 2500, 2500 – 3000. Now the new table is as follows
Fund (Rs.) |
0 - 1000 |
1000 - 1500 |
1500 - 2000 |
2000 - 3000 |
No. of students |
6 |
24 |
18 |
2 |
i. Solve by direct method.
ii. Verily that the mean calculated by assumed mean method is the same.
iii. Find the mean in the above example by taking A
= 1750.