WORD PROBLEMS on Statistics 7 for Class 9 and 10
Question for practice
The following questions are more helpful for class tenth students for all boards.
Questions 7. The median class of a frequency distribution 120 - 140. The frequency and the cumulative frequency of the class preceding the median class are 20 and 22 respectively. Find the sum of the frequencies, if the median of the above data is 127.
Submit your answer here in the comments or wait for answer
Questions 7. The median class of a frequency distribution 120 - 140. The frequency and the cumulative frequency of the class preceding the median class are 20 and 22 respectively. Find the sum of the frequencies, if the median of the above data is 127.
Submit your answer here in the comments or wait for answer
127=120+{(n/2-22)/20} x20
ReplyDelete7 =n/2-22
29 =n/2
n =58
Median= 127
ReplyDeletecf0= 22
f=20
l=120
h=20
Me= l + (N/2 - cf0)/f x h
127= 120 + (N/2 - 22)/20 x 20
127= 120 + N/2 - 22
7 = N/2- 22
29 = N/2
N = 58
SUM OF FREQUENCIES = 58