Q31 of 27 Page 1

The median of the following data is 16. Find the missing frequencies a and b, if the total of the frequencies is 70.



n/2 = 35


Median class = 15 - 20


55 + a + b = 70


a + b = 15


median =


1 = (11 - a)/3


a = 8


55 + a + b = 70


55 + 8 + b = 70, i.e. b = 7


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