A Laboratory Worker Finds That 1

question 104

Multiple Choice

A laboratory worker finds that 1.4% of his blood samples tested positive for the HIV virus.How many blood samples should he expect to test before finding one which tests positive for the HIV virus?

• A)1.01
• B)71.43
• C)0.986
• D)1.4
• E)98.6

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Definitions:

Hemoglobin

A protein found in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs.

Meaning

The significance or interpretation of a thing, symbol, or event; the underlying purpose or concept.

Rhesus Factor

A protein substance on the surface of red blood cells that can cause immune response differences, significant in blood transfusion and pregnancy.

Abbreviation

A shortened form of a word or phrase, used to simplify writing and speech.