Published by:
CGP EDU Academic Team
Published on: August 11, 2026
The mean and variance of a set of 15 numbers are 12 and 14 respectively. The mean and variance of another set of 15 numbers are 14 and 
respectively. If the variance of all the 30 numbers in the two sets is 13, then 
is equal to
Text Solution
Verified by ExpertsThe correct answer is:
D
Combine var. 
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