Question

in a frequency distribution table of 0-20,10-20,20-30,............, the class marks of 50-60is A 50 B 60 C55 D 10

Answer 1

Hii dear here is your answer

class mark=upper limit +lower limit/2
50+60/2
=110/2=55

so here C option is correct

Answer 2

class mark=50+60/2
                  =110/2
                  =55
    answer   = c 55