Q. 94.7( 3 Votes )

An incomplete dis

Answer :

(i)

Given, Median = 46


Then, median class = 40-50


Therefore, l = 40, h = 10, f = 65, F = 42 + x


Median = l +


46 = 40 + * 10


= 73 – x


39 = 73 – x


x = 73 – 39


x = 34


Given, N = 230


= 12 + 30 + 34 + 65 + y + 25 + 18 = 230


= 184 + y = 230


= y = 230 – 184 = 46


(ii)



Mean =


= = 45.87


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