document.write( "Question 1042143: Suppose that a composing has 6 digit ID numbers consisting of numbers from 0-9. How many such ID numbers contain no 7s and have no repeated digits? \n" ); document.write( "
Algebra.Com's Answer #657079 by jorel555(1290)![]() ![]() ![]() You can put this solution on YOUR website! 0-9 equals 10 digits. \n" ); document.write( "Removing \"7\" leaves 9 possible digits. \n" ); document.write( "9 non-repeating digits chosen 6 at a time equals: \n" ); document.write( "9!/6!3!=84 possible combinations of non-repeating numbers. \n" ); document.write( " |