document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1025108>Question 1025108</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many 5 digit numbers can be formed with 0,1,2,3,4,5,6,7,8,9 if (a) pre petitions are allowed, (b) repetitions are not allowed, (c) the last digit must be 2 and repetitions are not allowed, (d) the last digit must be 2 and repetitions are allowed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #656683 by </B><A HREF=/tutors/aboutme.mpl?userid=nishantxumar><B>nishantxumar(3)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nishantxumar><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=656683\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (a) if repetition are allowed then _ _ _ _ _  in the first space we have only 9 choice as 0 cant be considered.  and for all rest 4 space we have 10 choices.... so answer becomes 9*10^4.\r<BR>\n" );
document.write( "\n" );
document.write( "(b)when repetition are not allowed thn _ _ _ _ _   for the 1st space we have 9 choice.... and now we use the formula for we have to select 4 out of 9 which is 9p4 and the answer becomes 9*9*8*7*6.    </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );