document.write( "Question 325728: A pair of fair dice is rolled. Find the probability that the sum of the two numbers facing up is less than 10. \n" ); document.write( "

Algebra.Com's Answer #233197 by solver91311(24713) $\"\"$ $\"About$

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Sum	Ways	# of Ways
2	1,1	1
3	1,2; 2,1	2
4	1,3; 2,2; 3,1	3
5	1,4; 2,3; 3,2; 4,1	4
6	1,5; 2,4; 3,3; 4,2; 5,1	5
7	1,6; 2,5; 3,4; 4,3; 5,2; 6,1	6
8	2,6; 3,5; 4,4; 5,3; 6,2	5
9	3,6; 4,5; 5,4; 6,3	4
10	4,6; 5,5; 6,4	3
11	5,6; 6,5	2
12	6,6	1

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\n" ); document.write( "\n" ); document.write( "The probability of anything is the number of ways that it can happen that you would consider a success divided by the number of ways it can happen total -- successes and failures.\r
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\n" ); document.write( "\n" ); document.write( "If you add up the number of total ways that you can roll a pair of dice you get 36. There are 3 ways to get a ten, 2 ways to get an 11 and 1 way to get a 12, so there must be 36 minus 6 (3 plus 2 plus 1) ways to get less than 10.\r
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