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  • 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  <div class='qna-o

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

 

Option: 1

12^2-1


Option: 2

2^{12}


Option: 3

2^{12}-1


Option: 4

12^{12}


Answers (1)

best_answer

For each bulb there are two possibilities. It will be switched either on or off. Hence, the total number of ways in which the room can be illuminated are 2^{12}-1

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chirag

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