An urn contains 12 balls,5 of which are red.Selection of a red ball is desired and is therefore considered to be a success.If three balls are selected,what is the expected value of the distribution of the number of selected red balls?
A)0.4167
B)0.8333
C)0.5833
D)1.2500

Question

Quizplus · Accepted Answer

The expected value for the number of red balls selected can be calculated using the formula for the hypergeometric distribution: E(X) = n * (k/N), where n is the number of draws (3), k is the number of successes in the population (5 red balls), and N is the total population size (12 balls). So, E(X) = 3 * (5/12) = 1.25.

An Urn Contains 12 Balls,5 of Which Are Red