document.write( "Question 13233: How many integers between 10 and 100 have exactly one digit equal to 3? \n" ); document.write( "
Algebra.Com's Answer #6728 by rapaljer(4671)\"\" \"About 
You can put this solution on YOUR website!
Ooops!! In the posted solution for this, smik seems to have missed a few of the possibilities. \r
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\n" ); document.write( "\n" ); document.write( "These were listed:13, 23, 30, 43, 53, 63, 73, 83, 93 . \r
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\n" ); document.write( "\n" ); document.write( "Also, the numbers 31, 32, 34, 35, 36, 37, 38, and 39 should have been listed. There is a formula of sorts, there are 9 possibilities for the units digit, and 9 possibilities for the tens digit to be a 3, and then subtract one for the case in which both digits are 3, since that case was counted twice. So there should be 9+9-1 = 17 possibilities. Right?\r
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\n" ); document.write( "\n" ); document.write( "R^2 at SCC
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