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)\"\" \"About 
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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.
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