document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1192601>Question 1192601</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assuming that 30% of all industrial accidents in a certain plant are caused by failure of employees to follow instructions, find, approximately, the probability that among 84 industrial accidents in this plant anywhere from 20 to 30 (inclusive) will be due to failure of employees to follow instructions. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #824499 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=824499\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean is np=25.2<BR>\n" );
document.write( "variance is np(1-p)=25.2*0.70=17.64<BR>\n" );
document.write( "sd = sqrt (V)=4.2<BR>\n" );
document.write( "z(min)=(19.5-25.2)/4.2<BR>\n" );
document.write( "=-5.7/4.2=-1.36<BR>\n" );
document.write( "-<BR>\n" );
document.write( "z=(30.5-25.2)/4.2<BR>\n" );
document.write( "=5/3/4.2<BR>\n" );
document.write( "=1.26<BR>\n" );
document.write( "probability z between those two values is 0.8093 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );