Question

The median class of a frequency distribution is 125-145. The frequency of the median class and cumulative frequency of the class preceding to the median class are 20 and 22 respectively. Find the sum of frequencies if the median is 137...​

Answer 1

Answer:

sum of frequencies n=34*2=68

Step-by-step explanation:

HERE GIVEN THAT

L=125,f=20,cf=22,h=20,median =137,n=?

median=l+( n/2-cf)*h/f

137= 125+(n/2-22)*20/20

137-125=(n/2-22)

12=n/2-22

n/2=22+12=34

so n=34*2=68

Answer 2

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