document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=97762>Question 97762</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Chapter 5: A Survey of Probability ConceptsISBN : 0072868244       Author : Douglas A. Lind, William G. Marchal, Samuel A. Wathen <BR>\n" );
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document.write( "exercise 42;<BR>\n" );
document.write( "A telephone number consists of seven digits, the first three representing the exchange. How many different telephone numbers are possible within the 537 exchange.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #71141 by </B><A HREF=/tutors/aboutme.mpl?userid=mathslover><B>mathslover(157)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathslover><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/cgi-bin/show-face.mpl?user=mathslover><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=71141\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> we have the number as 537_ _ _ _\r<BR>\n" );
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document.write( "Each of the blanks can be filled in 10 ways ( either of the numbers from 0-9)\r<BR>\n" );
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document.write( "So total numbers of ways = 10 * 10 * 10 * 10<BR>\n" );
document.write( "=10,000\r<BR>\n" );
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document.write( "Alternately, the numbers will be from 537 0000 to 537 9999\r<BR>\n" );
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document.write( "clearly there are 10000 different such numbers </SPAN>\n" );
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