Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The mean and standard deviation of 20 observations were calculated as 10 and 2.5 respectively. It was found that by mistake one data value was taken as 25 instead of 35. If 
and 
are the mean and standard deviation respectively for correct data, then 
is :
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Given:
Mean 
or 
(incorrect)
or 
Correct 
TEST PAPER WITH SOLUTION
Now correct 
again given 
or 
(incorrect)
or 
(Correct)
correct 
or 
──────────────────────────────────────────────────────────────────────────────────────────
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
PART-I PHYSICS
SECTION-A
The fractional change in the magnetic field intensity at a distance ' ' f…
The magnitude of vectors and in the given figure are equal. The direction of with -axis will be…
Car B overtakes another car A at a relative speed of . How fast will the image of car appear to m…
Inside a uniform spherical shell:
Two narrow bores of diameter and are joined together to form a U-shaped tube open at both ends. I…
An electric appliance supplies heat to the system. If the system delivers a power of . How long i…