Question
The mean and variance of the random variable X which follows the following distribution are respectively 
- 3,1
- 3,2
- 1,3
- 2,5
The correct answer is: 3,1
Related Questions to study
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We can only apply the L’Hospital’s rule if the direct substitution returns an indeterminate form, that means
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then x=
, 
, 
then A+B+C=
