calculate the arithmetic mean from following distribution 0-10, 10-20, 20-30, 30-40, 40-50 with....

calculate the arithmetic mean from the following distribution
class interval. frequency
0-10 6
10-20 10
20-30 9
30-40 4
40-50 11
(A) 26
(B) 25
(C) 24
(D) More than one of the above
(E) None of the above
#maths #wbbse #bpsctre #mean #arithematicmean #bpsc #distribution #frequency