If for some x ∈ R, the frequency distribution of the marks obtained by 20 students in a test is:Marks2357Frequency(x + 1)2(2x − 5)(x2 − 3x)x then the mean of the marks is:

If for some x ∈ R, the frequency distribution of the marks obtained

1.	If for some x ∈ R, the frequency distribution of the marks obtained by 20 students in a test is:Marks2357Frequency(x + 1)2(2x − 5)(x2 − 3x)x then the mean of the marks is:
A.	3.2
B.	3
C.	2.5
D.	2.8
Answer» E.