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Class 12 Tuition > Learn Class XI-XII Tuition (PUC) > There are 10 lamps in a hall. Each one of them can...
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There are 10 lamps in a hall. Each one of them can be switched on independently. How many no. Of ways in which the hall can be illuminated ?

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2^10 =1024 1024-1 1 being the position for all bulb switches in off position =1023
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GMAT Math Expert

(2^10) - 1
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(2^10)-1 = 1024-1 = 1023
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Computer geek and a Mathematician

1023
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Teaching is my passion!!!!

1023
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Chemistry Wizard/English Expert

plz go through the link http://www.beatthegmat.com/hall-can-be-lighted-t78082.html
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Medical & Engineering Classes

1023
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B.Tech.

If 109 electrons move out of a body to another body every second, how much time is required to get a total charge of 1 C on the other body?
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2^10-1 = 1023
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Native English Speaker with 32 years experience in teaching English and communication skills.

(2^10)-1 = 1024-1 = 1023
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