document.write( "Question 397772: sir, i could not find solution, I got stuck, please help me sir,\r \n" );
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document.write( "\"For a boy having 6 friends, how many ways are there to invite 1 or more of them to the lunch? \n" );
document.write( "a) 30 \n" );
document.write( "b) 40 \n" );
document.write( "c) 60 \n" );
document.write( "d) None of these. \n" );
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