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There are 10 lamps in a hall . Each...

There are 10 lamps in a hall . Each one of them can be swithed on independently the number of ways in which the hall can be illuminated is

A

`10^2`

B

`1023`

C

`2^(10)`

D

`10!`

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-PERMUTATIONS & COMBINATIONS-EXERCISE 1B (COMBINATIONS )
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