If Two Equally Likely Events a and B Are Mutually

question 109

Multiple Choice

If two equally likely events A and B are mutually exclusive and collectively exhaustive, what is the probability that event A occurs?

• A) 0.
• B) 0.50
• C) 1.00
• D) cannot be determined from the information given

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Definitions:

Specific Immunity

The immune system's targeted response to particular pathogens or foreign substances, involving recognition of specific antigens and memory of previous encounters.

Nonspecific Immunity

The component of the immune system that provides general defense against pathogens without needing prior exposure to them, also known as innate immunity.

Immune System Function

The role performed by the body's immune system in defending against pathogens, infections, and other foreign substances, by detecting and responding to them.

Diathesis-Stress Model

A psychological theory that explains behavior as a predispositional vulnerability together with stress from life experiences.