Find the missing frequency 'x' in this data, given that the arithmetic mean is 28.
|
Profit % |
0 - 10 |
10 - 20 |
20 - 30 |
30 - 40 |
40 - 50 |
50 - 60 |
|
No. of shops |
12 |
18 |
27 |
x |
17 |
6 |
1
20
2
24
3
15
4
12