document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=414169>Question 414169</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I was wondering if someone could tell me if I got these problems right? I am finding this to be a difficult subject.\r<BR>\n" );
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document.write( "A pin consists of 2 letters followed by 3 numbers (assume repetition is allowed and order is important).\r<BR>\n" );
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document.write( "a) how many different pin numbers are there?<BR>\n" );
document.write( "26*26*10*10*10=676,000\r<BR>\n" );
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document.write( "b) what is the proabilty a pin number selected randomly ends in 000?<BR>\n" );
document.write( "26*26*9*9*9=492,804\r<BR>\n" );
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document.write( "c)what is the probability a pin selected at random begins with AA?<BR>\n" );
document.write( "25*25*10*10*10=625,000\r<BR>\n" );
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document.write( "d)what is the probability a pin selected at random being with A and ends with 00?<BR>\n" );
document.write( "25*26*10*9*9=526,500\r<BR>\n" );
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document.write( "e)what is the probability a pin selected at random has a repeated letter and different numbers?<BR>\n" );
document.write( "26*25*10*9*8=468,000<BR>\n" );
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document.write( "Thanks for your time and help,<BR>\n" );
document.write( "Gina </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #290488 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=290488\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A pin consists of 2 letters followed by 3 numbers (assume repetition is allowed and order is important). <BR>\n" );
document.write( "a) how many different pin numbers are there?<BR>\n" );
document.write( "26*26*10*10*10=676,000 <BR>\n" );
document.write( "b) what is the probabilty a pin number selected randomly ends in 000?<BR>\n" );
document.write( "26*26*9*9*9=492,804<BR>\n" );
document.write( "So probability = 492,804/676,000<BR>\n" );
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document.write( "c)what is the probability a pin selected at random begins with AA?<BR>\n" );
document.write( "25*25*10*10*10=625,000<BR>\n" );
document.write( "So probability = 625,000/676,000<BR>\n" );
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document.write( "d)what is the probability a pin selected at random begins with A and ends with 00?<BR>\n" );
document.write( "1*26*10*1*1=260<BR>\n" );
document.write( "So probability = 260/676,000<BR>\n" );
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document.write( "e)what is the probability a pin selected at random has a repeated letter and different numbers?<BR>\n" );
document.write( "That depends on the rules followed for building the pin.<BR>\n" );
document.write( "If repetition is allowed in building the pin the probability is 1.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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