Question

step division method find mean

Answer 1

first of all you make xi which is the mid value of class frequency like 100-150 is add both and divided by 2 then take the mid number of xi then minus that number to all the xi then you find the d=<x-a>/i and multiply the fi with di you got fd then calculate the fd and fi and at last put the formula sigma fd/sigma fi youre answer will come