document.write( "Question 1150462: Two numbers are randomly selected (with replacements) from the first 12 positive integers. What is the probability that the sum of these two numbers is 10? \n" ); document.write( "

Algebra.Com's Answer #771835 by ikleyn(52780) $\"\"$ $\"About$

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document.write( "The number of all possible outcomes is  12*12 = 144.\r\n" );
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document.write( "    It is the number of all pairs (a,b) with integers \"a\" and \"b\" from 1 to 12 inclusive.\r\n" );
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document.write( "The favorable pairs are (1,9), (2,8), (3,7), (4,6), (5,5), (6,4), (7,3), (8,2) and (9,1).\r\n" );
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document.write( "The number of favorable pairs is 9.\r\n" );
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document.write( "The probability under the question is  P =  = .    ANSWER\r\n" );
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