Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The first of the two samples in a group has 100 items with mean 15 and standard deviation 3. If the whole group has 250 items with mean 15.6 and standard deviation 
, then the standard deviation of the second sample is :
Text Solution
Verified by ExpertsThe correct answer is:
C
m=250
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