Variability and Probability

Question

A random variable takes on the value 2 with probability 1/3, the value 4 with probability 1/ 2 , and the value 14 with probability 1/6. Find the expected value of this random variable.

Question 48 options:

	4
	10
	6
	12
	5

Answer 1

Five.

Last choice is correct. Save the best for last. Why people eat desert last.

2(1/3) + 4(1/2) + 14(1/6) = 5