Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let the mean of 6 observations 1,2,4,5, x and y be 5 and their variance be 10. Then their mean deviation about the mean is equal to
A
B
3
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Consider the data 1,2,4,5, x, y.
So,
And,
We have 
and 
.
Now solving above equations we get, 
,
Now mean deviation about mean will be 
Therefore, the required answer is 
──────────────────────────────────────────────────────────────────────────────────────────
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Let the six numbers be in A.P and . If the mean of these six numbers is and their variance is ,…
The mean and variance of the marks obtained by the students in a test are 10 and 4 respectively. La…
There rotten apples are mixed accidently with seven good apples and four apples are drawn one by on…
Let S be the set of all values of for which the mean deviation about the mean of 100 consecutive p…
Let the mean and standard deviation of marks of class A of 100 students be respectively 40 , and t…
The mean and variance of 6 observations are 5 and 8 respectively. If 3 observations are 1, 3, 5 the…