1012
1112
12
13
Correct answer is C
Median = L + [N2−ffm]h
N = Sum of frequencies
L = lower class boundary of median class
f = sum of all frequencies below L
fm = frequency of modal class and
h = class width of median class
Median = 11 + [502−2120]5
= 11 + (25−2120)5
= 11 + ((4)20)
11 + 1 = 12
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