document.write( "Question 291630: The access code for a car's security consists of four digits. The first digit cannot be 3 and the last digit must be odd.
\n" ); document.write( "1) How many diff codes are available?
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Algebra.Com's Answer #210885 by Fombitz(32388)\"\" \"About 
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If there were no restrictions, there would be 10000 possible choices from 0000 to 9999.
\n" ); document.write( "Since the first number cannot be 3 then 3000-3999 are not available leaving only 9000 choices.
\n" ); document.write( "The last digit is either even or odd and are evenly distributed so 4500 odds and 4500 evens.
\n" ); document.write( "So that leaves 4500 available codes with the first number not 3 and the last digit not odd.
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