document.write( "Question 852442: there are 10 lamps in a hall .each one of them can be switched on independently .the number of ways in which the hall can be illuminated is \n" ); document.write( "

Algebra.Com's Answer #513387 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( " 2^10, number of ways in which the hall can be illuminated  \n" );
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