Find the expected value of the random variable in the experiment.
-Three coins are tossed, and the number of tails is noted.
A)2
B) 1
C) 1.5
D) 1.75

Question

Quizplus · Accepted Answer

The expected value is calculated by summing the products of each outcome and its probability. The probabilities for 0, 1, 2, and 3 tails are 1/8, 3/8, 3/8, and 1/8 respectively. The expected value is (0)(1/8) + (1)(3/8) + (2)(3/8) + (3)(1/8) = 1.5.

Find the Expected Value of the Random Variable in the Experiment