Variable | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | Total |
Frequency | 12 | 13 | ? | 65 | ? | 25 | 18 | 229 |
Answer:
Let the frequency of the class 30-40 be and
that of the class 50-60 beThe
total frequency is 229.
It is given that the median is 46.
Clearly, 46 lies in the class 40 - 50 .
40-50
is the median class.
and
Now, Median
Since
Thus
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