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Question -

Find the mean, median and mode of the following data (C.B.S.E. 2008)



Answer -

Let assumed mean A = 70
 
(i) Here N = 50, then N/2 = 50/2 = 25 which lies in the class 60-80
∴ l= 60, F= 24, f = 12 , h = 20

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