document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1031489>Question 1031489</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An electronics store received a shipment of 20 calculators, including 7 defective. 4 of the calculators are selected to be sent to a high school.\r<BR>\n" );
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document.write( "A)How many selections can be made using the original shipment?\r<BR>\n" );
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document.write( "B) How many selections will contain defective calculators?\r<BR>\n" );
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document.write( "C) How many will contain 1 defective calculator?\r<BR>\n" );
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document.write( "D) How may of these will contain 3 defective calculators?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #646184 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=646184\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An electronics store received a shipment of 20 calculators, including 7 defective. 4 of the calculators are selected to be sent to a high school. <BR>\n" );
document.write( "A)How many selections can be made using the original shipment?::<BR>\n" );
document.write( "20C4 = (20*19*18*17)/(1*2*3*4) = (5*19*3*17) = 4845<BR>\n" );
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document.write( "B) How many selections will contain defective calculators?<BR>\n" );
document.write( "# with NO defective = 13C4 = (13*12*11*10)/(1*2*3*4) = (13*11*5) = 715<BR>\n" );
document.write( "# with at least one defective = 4845-715<BR>\n" );
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document.write( "C) How many will contain 1 defective calculator?<BR>\n" );
document.write( "7C1*13C3 = 7*286 = 2002<BR>\n" );
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document.write( "D) How may of will contain 3 defective calculators?<BR>\n" );
document.write( "7C3*13C1 = 13*(7*6*5)/(1*2*3) = 455<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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