document.write( "Question 504611: A man has 3 friends .In how many was can he invite one or more of them to dinner \n" ); document.write( "
Algebra.Com's Answer #339742 by richard1234(7193)![]() ![]() You can put this solution on YOUR website! There are 2^3 = 8 ways for the man to invite 0, 1, 2, or 3 friends. We subtract the number of ways to invite none of his friends which would be 3C0 = 1) to obtain 7 ways. \n" ); document.write( " |