document.write( "Question 990557: A pair of dice is rolled seven times. Find the probability of rolling an even total exactly once. The probability that an even total is rolled exactly once is \n" ); document.write( "
Algebra.Com's Answer #610637 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "There is 1 way to make a 2, 3 ways to make four, 5 ways to make six, 5 ways to make 8, 3 ways to make ten, and 1 way to make 12, for a total of 18 ways to make an even number.\r
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\n" ); document.write( "\n" ); document.write( "There are 2 ways to make three, 4 ways to make five, 6 ways to make seven, 4 ways to make nine, and 2 ways to make eleven, for a total of 18 ways to make an odd number.\r
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\n" ); document.write( "\n" ); document.write( "Hence, the probability of an even total on any given roll is \r
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\n" ); document.write( "\n" ); document.write( "The probability of successes in trials where is the probability of success on any given trial is given by:\r
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\n" ); document.write( "\n" ); document.write( "Where is the number of combinations of things taken at a time and is calculated by \r
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\n" ); document.write( "\n" ); document.write( "You need the probability of 1 success in 7 trials where the probability of success on any given trial is 0.5, so:\r
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\n" ); document.write( "\n" ); document.write( "Get out your calculator.\r
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\n" ); document.write( "My calculator said it, I believe it, that settles it\r
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