document.write( "Question 846262: Consider numbers of length 5 over the ten digits 0 to 9. Suppose repetition is allowed. The numbers may begin with 0.
\n" ); document.write( "a) How many of these numbers have no 0?
\n" ); document.write( "b) How many of there numbers have at least one 0?
\n" ); document.write( "c) How many of these numbers have exactly three 0s?
\n" ); document.write( "

Algebra.Com's Answer #509667 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Consider numbers of length 5 over the ten digits 0 to 9. Suppose repetition is allowed. The numbers may begin with 0.
\n" ); document.write( "a) How many of these numbers have no 0?:: 9^5
\n" ); document.write( "-----------------------------------------------------------
\n" ); document.write( "b) How many of there numbers have at least one 0?:: 10^5-9^5
\n" ); document.write( "-----------------------------------------------------------
\n" ); document.write( "c) How many of these numbers have exactly three 0s?:: 9^2
\n" ); document.write( "=========================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "
\n" ); document.write( "
\n" );