document.write( "Question 115154: A professor grades homeowrk by randomly checking 7 of the 20 problems assigned. in how many different ways can this be done? \n" ); document.write( "
Algebra.Com's Answer #83774 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! 20*19*18*17*16*15*14=390,700,800 ways to select 7 out of 20 problems. \n" ); document.write( " |