If the mean of the following distributions is 27, Find the value of p
Class | 0-10 | 20-Oct | 20-30 | 30-40 | 40-50 |
Frequency | 8 | p | 12 | 13 | 10 |
We can draw the following table:-
Class Interval | Class Marks(x) | Frequency(f) | (x)(f) |
0-10 | 5 | 8 | 40 |
10-20 | 15 | p | 15p |
20-30 | 25 | 12 | 300 |
30-40 | 35 | 13 | 455 |
40-50 | 45 | 10 | 450 |
Since,