Nanette Must Pass Through Three Doors as She Walks from Her

question 59

Multiple Choice

Nanette must pass through three doors as she walks from her company's foyer to her office. Each of these doors may be locked or unlocked. Let B be the event that exactly two doors are locked. List the outcomes of B . [Let "L" designate "locked" and "U" designate "unlocked".]

• A) {LLU, LUL, ULL}}
• B) {LLL, LLU, LUL, LUU, ULL, ULU, UUL, UUU}
• C) {LLU, LUL, ULL, LUU, ULU, UUL}
• D) None of these.

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Definitions:

Adaptive Immunity

The branch of the immune system that involves memory, allowing for a faster and more specific response to pathogens previously encountered.

Plasma Cells

A type of white blood cell that produces and secretes large volumes of antibodies.

Clonal Selection Theory

A fundamental principle in immunology that explains how lymphocytes proliferate and differentiate in response to specific antigens, leading to immune memory.