document.write( "Question 747801: On two rolls of a single die, you will lose $10 if a 4 turns up at least once, and you will win $3 otherwise. What is the expected value of the game?\r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #455202 by FrankM(1040) You can put this solution on YOUR website! The chance of a 4 is 1 in 6.\r \n" ); document.write( "\n" ); document.write( "In the 36 possible combinations, 6 times a 4 will be first, and 6 times a 4 will be second, so 12 rolls out of 36. But one of these are double counted, the 4,4 outcome. So it's really 11 rolls that contain a 4. The remaining 25 outcomes contain no 4.\r \n" ); document.write( "\n" ); document.write( "11 * -$10 = -$110 \n" ); document.write( "25 * $3 = $75\r \n" ); document.write( "\n" ); document.write( "36 rolls produce -$35, or -$0.97 per roll. \n" ); document.write( " |