Permutations And Combinations Question 166
Question: In a room, there are 12 bulbs of the same wattage, each having a separate switch. The number of ways to light the room with different amount of illumination is
Options:
A) $ 12^{2}-1 $
B) $ 2^{12} $
C) $ 2^{12}-1 $
D) $ 12^{2} $
Correct Answer: C
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Answer:
Solution:
BETA
