document.write( "Question 1165886: How many different license plates are possible if there are four letters and two digits (0 through 9) on each plate and no repetition of either is allowed? \n" ); document.write( "
Algebra.Com's Answer #790353 by ikleyn(52860)\"\" \"About 
You can put this solution on YOUR website!
.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "There is one  VERY  IMPORTANT  moment,  which is  MISSED  in the problem's formulation.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "In real life,  the letters in license plates usually are located on some fixed  (assigned) positions,
\n" ); document.write( "and the digit occupy the remaining positions.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The problem is  SILENT  about it,  which makes everything very  QUESTIONABLE  and  UNCERTAINT.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "To be posed correctly,  the problem  EITHER  must say that the letters may occupy any  4  arbitrary positions,
\n" ); document.write( "OR are fixed in some  4  assigned positions.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "----------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "I just see the  SECOND  problem in a row posed  DEFECTIVELY.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "It forces me to start thinking  what is the source  of these/such problems.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );