An Urn Contains 12 Balls,5 of Which Are Red

question 60

Multiple Choice

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

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Definitions:

Ulna

One of the two long bones in the forearm, located on the side opposite the thumb, that forms the elbow joint with the humerus above and the wrist joint with the radius below.

Radius

A bone in the forearm that extends from the elbow to the wrist alongside the ulna, crucial for wrist movement.

Trauma Unit

A specialized department within a hospital equipped and staffed to provide care for patients suffering from major traumatic injuries.

Oncology Unit

A specialized department within a hospital or medical center focused on the treatment and care of patients with cancer.