document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=649298>Question 649298</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains 21 transistors, 7 of which are defective. If 7 are selected at random, find the probabpility that:<BR>\n" );
document.write( " A. All are defective<BR>\n" );
document.write( " B. None are defective </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #406910 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=406910\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A box contains 21 transistors, 7 of which are defective. If 7 are selected at random, find the probabpility that:<BR>\n" );
document.write( "Binomial Problem with n = 21 ; P(defective) = 7/21 = 1/3 ; P(good) = 2/3\r<BR>\n" );
document.write( "\n" );
document.write( "A. P(All are defective) = (1/3)^7 = 0.0004572...<BR>\n" );
document.write( "------<BR>\n" );
document.write( "B. P(None are defective) = (2/3)^7 = 0.0585<BR>\n" );
document.write( "===================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );