Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If the mean and the variance of 
are 9 and 9.25 respectively, then 
is equal to:
Text Solution
Verified by ExpertsThe correct answer is:
A
Let’s set up two equations from the given
mean and variance:
Mean =9 
total sum 
Known values sum to 
, so
a + b = 72 
Population variance 
Known squares sum to 
Now use
Finally,
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