An Urn Contains 3 Red, 2 Blue, and 5 Green

question 23

Multiple Choice

An urn contains 3 red, 2 blue, and 5 green marbles. If we pick 4 marbles with replacement and count the number of red marbles in the 4 picks, the random variable is:

• A)the number of red marbles.
• B)the number of red, blue, or green marbles.
• C)the number of green marbles.
• D)None of the answer options is correct.

---

Definitions:

Viral Load

The quantity of virus present in a person's blood, often used to assess the severity of viral infections, including HIV.

CD4 Count

A measure of the number of CD4 T cells in a cubic millimeter of blood, used as an indicator of immune function in individuals, particularly those with HIV.

HIV Tests

Medical tests used to determine if an individual has been infected with the Human Immunodeficiency Virus (HIV), which can lead to AIDS if untreated.

Negative Test Result

An outcome of a medical test indicating the absence of a particular condition or substance being tested for.