document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=472041>Question 472041</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question: A battery is defective with probability 0.3. What is the probability that in a pack of 8 batteries: \r<BR>\n" );
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document.write( "1) Exactly 2 are defective\r<BR>\n" );
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document.write( "2) At most 2 are defective? (hintL at most = less than or equal to)\r<BR>\n" );
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document.write( "3) More than 2 are defective? \r<BR>\n" );
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document.write( "4) What is the expected number of defective batteries in the 8-pack?\r<BR>\n" );
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document.write( "5) What is the standard deviation of the number of defective batteries in the 8-pack? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #323763 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=323763\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> n=8, p=.3, q=.7<BR>\n" );
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document.write( "4)E(x)=np=8*.3=2.4<BR>\n" );
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document.write( "5)<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sigma=sqrt%28npq%29=sqrt%288%2A.3%2A.7%29=1.296 ALIGN=MIDDLE  ALT=\"sigma=sqrt%28npq%29=sqrt%288%2A.3%2A.7%29=1.296\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "1)<BR>\n" );
document.write( "nCr=8C2=28 coefficient<BR>\n" );
document.write( "28*p^2*q^6=.2965<BR>\n" );
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document.write( "Ed </SPAN>\n" );
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