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 C be the event that at least two doors are unlocked. List the outcomes of C. [Let "L" designate "locked" and "U" designate "unlocked".]
A) {LLU, LUL, ULL, LUU, ULU, UUL}
B) {UUU, LUU, ULU, UUL}
C) {LLL, LLU, LUL, LUU, ULL, ULU, UUL, UUU}
D) None of these.

Question

Quizplus · Accepted Answer

Out of the eight possible outcomes listed in option C, only four have at least two doors unlocked (LLU, LUL, ULU, UUL). Therefore, option B is the correct answer as it contains only the four outcomes that satisfy the condition of at least two unlocked doors.

Nanette Must Pass Through Three Doors as She Walks from Her