Q. 34.6( 32 Votes )

If the mean of the following frequency distribution is 7.2 find value of ‘K’.


Answer :

Given is the frequency distribution table for ungrouped data.

We have



Mean of such ungrouped data is given by




[ Mean = 7.2]


7.2(40 + K) = 260 + 10K


288 + 7.2K = 260 + 10K


10K – 7.2K = 288 – 260


2.8K = 28


K = 28/2.8


K = 10


Thus, K = 10.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Median and ModeQuiz | Median and ModeQuiz | Median and Mode29 mins
Quiz | Basics of  MeanQuiz | Basics of  MeanQuiz | Basics of Mean37 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :