1.

If for some x∈R, the frequrency distribution of the marks obtained by 20 students in a test is : Marks 2 3 5 7 Frequency (x+1)2 2x−5 x2−3x x then the mean of the marks is :

Answer»

If for some xR, the frequrency distribution of the marks obtained by 20 students in a test is :

Marks 2 3 5 7
Frequency (x+1)2 2x5 x23x x

then the mean of the marks is :


Discussion

No Comment Found