document.write( "Question 433457: A test is given with 10 T-F questions. How many different ways can the answer sheet be filled out so that 8 or more questions are answered correctly? I am drawing a blank and do not know where to start?
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Algebra.Com's Answer #300472 by jorel1380(3719)![]() ![]() You can put this solution on YOUR website! If you have 10 questions, of which 8 are solved correctly, then you have 10C8 different combinations of answers: \n" ); document.write( "10C8=10x9x8!/2x1x8!=5x9=45 different combinations. \n" ); document.write( " |