If the arithmetic mean from the following data
|
X |
5 |
15 |
25 |
35 |
45 |
|
f |
6 |
4 |
3 |
k |
2 |
is 21.5, the value of k will be
1
3
2
3.5
3
4
4
5
If the arithmetic mean from the following data
|
X |
5 |
15 |
25 |
35 |
45 |
|
f |
6 |
4 |
3 |
k |
2 |
is 21.5, the value of k will be