document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=618748>Question 618748</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In an effort to check the quality of their cell phones, a manufacturing manager decides to take a random sample of 10 cell phones from yesterday’s production run of 2000 phones.  If each of the 2000 phones is likely to be selected:<BR>\n" );
document.write( "i)What is the probability that a randomly selected cell phone will be one of the last 80 produced?<BR>\n" );
document.write( "ii)What is the probability that the first cell phone selected is either from the last 160 produced or from the first 90 to be produced?<BR>\n" );
document.write( "iii)What is the probability that the first two cell phones are both from the last 80 produced?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #389077 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=389077\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In an effort to check the quality of their cell phones, a manufacturing manager decides to take a random sample of 10 cell phones from yesterday’s production run of 2000 phones. If each of the 2000 phones is likely to be selected:<BR>\n" );
document.write( "i)What is the probability that a randomly selected cell phone will be one of the last 80 produced?<BR>\n" );
document.write( "Ans: 80/2000 = 8/200 = 1/25<BR>\n" );
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document.write( "ii)What is the probability that the first cell phone selected is either from the last 160 produced or from the first 90 to be produced?<BR>\n" );
document.write( "Ans: (160 + 90)/2000 = 250/2000 = 1/8<BR>\n" );
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document.write( "iii)What is the probability that the first two cell phones are both from the last 80 produced?<BR>\n" );
document.write( "P(1st 2 from last 80) = (1/25)(1/25) = 1/625<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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