A random variable X can take the values -1, 0 and 1 with respective probabilities 0.2,0.5 and 0.3. The expected value of X is:

by
Question:

A random variable X can take the values -1, 0 and 1 with respective probabilities 0.2,0.5 and 0.3. The expected value of X is:

A.

0.3

B.

0.5

C.

0.2

D.

0.1

Answer» d. 0.1

Note: The above multiple-choice question is for all general and Competitive Exams in India.