A) \[{{12}^{2}}-1\]
B) \[{{2}^{12}}\]
C) \[{{2}^{12}}-1\]
D) \[{{12}^{2}}\]
Correct Answer: C
Solution :
[c] For each bulb there are two possibilities. It will be switched either on or off. Hence, total number of ways in which the room can be illuminated is \[{{2}^{12}}-1.\]
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