The following table shows the funds collected by `50` students for flood affected people. Find the mean of the funds.

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

`i.` Solve by direct method.
`ii.` Verify that the mean claculated by assumed mean method is the same.
`iii`. Find the mean in the above example by taking `A=1750`.