Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B2

Chapter

Probability Distributions

Question:

A random variable X has the following probability distribution:

X

-2

-1

0

1

2

 P(X) 

 0.2 

 0.1 

 0.3 

 0.2 

 0.2 

The variance of X will be:

Options:

0.1

1.42

1.89

2.54

Correct Answer:

1.89

Explanation:

The correct answer is Option (3) → 1.89