document.write( "Question 283076: What is the probability that the ones digit is 9 in the sum of two two-digit prime numbers?\r
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document.write( "a) 4/10 b) 3/10 c) 0 d) 4/9 e) 1/3\r
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Algebra.Com's Answer #205501 by nabla(475)![]() ![]() ![]() You can put this solution on YOUR website! There are 21 two digit prime numbers: \n" ); document.write( "11 \n" ); document.write( "13 \n" ); document.write( "17 \n" ); document.write( "19 \n" ); document.write( "23 \n" ); document.write( "29 \n" ); document.write( "31 \n" ); document.write( "37 \n" ); document.write( "41 \n" ); document.write( "43 \n" ); document.write( "47 \n" ); document.write( "53 \n" ); document.write( "59 \n" ); document.write( "61 \n" ); document.write( "67 \n" ); document.write( "71 \n" ); document.write( "73 \n" ); document.write( "79 \n" ); document.write( "83 \n" ); document.write( "89 \n" ); document.write( "97 \r \n" ); document.write( "\n" ); document.write( "Can you make a 9 by adding any two of 1,3,7,9? Hence, one should choose c as the answer. \n" ); document.write( " |