Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let 
be the discrete random variable representing the number ( 
) appeared on the face of a biased die when it is rolled. The probability distribution of 
is
1 | 2 | 3 | 4 | 5 | 6 | ||
0.1 | 0.15 | 0.3 | 0.25 |
Then variance of 
is
Text Solution
Verified by ExpertsThe correct answer is:
B
We know that,
Now, mean, 
Variance 
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