question_answer

In the frequency distribution, discrete data is given.

Variable \[(x)\]	0	1	2	3	4	5
Frequency \[(f)\]	\[x\]	20	40	40	20	4

If the mean is 2.5, what is the value of frequency\['x'\]?

A) 0                             

B)        1    

C) 3                             

D)        4