Saved Bookmarks
| 1. |
If the mean deviation about the mean of the numbers 1, 2, 3, ..., n, where n is odd, is (5(n + 1))/n then n is equal to____ |
|
Answer» Mean deviation about mean of first n natural numbers is \(\frac{n^2-1}{4n}\) ∴ n = 21 |
|