Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Three rotten apples are mixed accidently with seven good apples and four apples are drawn one by one without replacement. Let the random variable 
denote the number of rotten apples. If 
and 
represent mean and variance of 
, respectively, then 
is equal to
Text Solution
Verified by ExpertsThe correct answer is:
D
Total Apple 
Rotten apple 
, good apple 
Prob. of rotten apple 
Prob. of good apple 
Number of rotten apples
here 
0 | 1 | 2 | 3 | |
Now,
and 
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