document.write( "Question 283076: What is the probability that the ones digit is 9 in the sum of two two-digit prime numbers?\r
\n" ); document.write( "\n" ); 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)\"\" \"About 
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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.
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