Question

In the frequency distribution of discrete data given below, the frequency x against value 'O' is missing.
Variable (X)
0
1
2
3
4.
5
Frequency (F)
40
40
20
40
If the mean is 2.5, then the missing frequency 'x' will be?
In the adjoining figure, pllq, find the unknown angles.
X
20​

Answer 1

Answer:

20 is the answer of this question without check my book and internet