document.write( "Question 887675: Suppose a teacher gives a four question true-false test. The correct answers are F,T,T,F. If a students guesses the answers, how many of the outcomes would have exactly two correct answers? \n" ); document.write( "
Algebra.Com's Answer #537009 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "It doesn't matter what the correct answers are.\r\n" );
document.write( "We can choose 2 correct answers out of 4 in C(4,2)\r\n" );
document.write( "ways. That's \"4%21%2F%282%21%284-2%29%21%29\" = \"24%2F%282%2A2%29\" = 6 ways.\r\n" );
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document.write( "You can check by listing them all and see that 6 is correct!\r\n" );
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document.write( "F, T, T, F\r\n" );
document.write( "----------\r\n" );
document.write( "T, T, T, T  2 correct  <--1 \r\n" );
document.write( "T, T, T, F  3 correct\r\n" );
document.write( "T, T, F, T  1 correct\r\n" );
document.write( "T, T, F, F  2 correct  <--2\r\n" );
document.write( "T, F, T, T  1 correct\r\n" );
document.write( "T, F, T, F  2 correct  <--3\r\n" );
document.write( "T, F, F, T  0 correct\r\n" );
document.write( "T, F, F, F  1 correct\r\n" );
document.write( "F, T, T, T  3 correct\r\n" );
document.write( "F, T, T, F  4 correct\r\n" );
document.write( "F, T, F, T  2 correct  <--4\r\n" );
document.write( "F, T, F, F  3 correct\r\n" );
document.write( "F, F, T, T  2 correct  <--5\r\n" );
document.write( "F, F, T, F  3 correct\r\n" );
document.write( "F, F, F, T  1 correct\r\n" );
document.write( "F, F, F, F  2 correct  <--6\r\n" );
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document.write( "Edwin
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