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CGP EDU Academic Team
Published on: August 23, 2026
The mean and variance of the marks obtained by the students in a test are 10 and 4 respectively. Later, the marks of one of the students is increased from 8 to 12 . If the new mean of the marks is 10.2, then their new variance is equal to:
Text Solution
Verified by ExpertsThe correct answer is:
A
Let Number of observations is 
Given 
After Change
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