document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=273187>Question 273187</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. The lifetime X of an electronic component has probability density function <BR>\n" );
document.write( "f(x) = c=x2<BR>\n" );
document.write( "for x > 10, and f(x) = 0 otherwise.<BR>\n" );
document.write( "(a) Determine the value of c.<BR>\n" );
document.write( "(b) Find the distribution function F(x) of X.<BR>\n" );
document.write( "(c) Find E(X) if it exists.<BR>\n" );
document.write( "(d) If an electronic device consists of 6 such components which operate independently,<BR>\n" );
document.write( "what is the probability that at least 2 will still be working after 15 time units?\r<BR>\n" );
document.write( "\n" );
document.write( "Does E(x) exist? I need help with d) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #199598 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=199598\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Your function equation is garbled.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );