12
ING
Noodles
Find the mean length of leaf
15. An incomplete distribution is given as follows
Vanable 0-10 10-20 20-30 30-40 40-50 50-60 60-70
Frequency 10 20
40 ? 25 15
You are given that the median value is 35 and the sum of all the frequencies is 1701
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Answer:
Class interval FrequencyCumulative Frequency 0−1010 10 10−2020 30 20−30f1 30+f1 30−4040 70+f1 40−50f2 70+f1+f2 50−6025 95+f1+f2 60−7015 110+f1+f2 Here, Median=35.
∴ median class is 30−40,N=170,then2N=2170=85
L=30,f=40,F=30+f1,h=10
⇒ Now, Median=L+f
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