document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1158650>Question 1158650</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A quality control engineer tests the quality of produced computers. Suppose that 5%<BR>\n" );
document.write( "of computers have defects, and defects occur independently of each other. Find the probability<BR>\n" );
document.write( "(a) of exactly 3 defective computers in a shipment of 10. (b) that the engineer at most 3 defective<BR>\n" );
document.write( "computers out of 10. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #781634 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=781634\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> exactly 3 defective is 10C3*0.05^3*0.95^7=0.0105 \r<BR>\n" );
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document.write( "at most 3 includes the above plus 0,1,2<BR>\n" );
document.write( "for 2 it is 10C2*0.05^2*0.95^8=0.0746<BR>\n" );
document.write( "for 1 it is 10*.95^9*0.05=0.3151<BR>\n" );
document.write( "for 0 it is 0.95^10=0.5987 <BR>\n" );
document.write( "the sum is 0.9989, which is the answer<BR>\n" );
document.write( " </SPAN>\n" );
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