Question

find the mean of the following data: class，120-130，130-140，140-150，150-160，160-170 and frequency: 2，8，12，20，8

Answer 1

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Answer 2

Step-by-step explanation:

h=10

cf=8

n=25

l=150

f=20

Median=l+[n/2-cf/f]×h

150+[25-8/20]×10

158..

Hope it helps..