Statisticshard · Past Paper
In a grouped frequency distribution, if the median class is 20-30, L=20, N=40, cf=15, f=10, h=10, the median is:
A25
B22.5
C27.5
D30
✓ Correct Answer: A — 25
Median = 20 + [(20 - 15)/10] * 10 = 20 + 5 = 25.
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