document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=177904>Question 177904</A>: <I><SPAN STYLE=\"word-break: break-all;\"> From experience, a battery manufacturer knows the probability of a battery being defective is .08.  If a retail customer buys four batteries, what is the probability that none of the batteries 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 #132949 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=132949\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Battery quality is an independent event, probabilities multiply.<BR>\n" );
document.write( "Probability of 1 defect free battery = 1-0.08=0.92<BR>\n" );
document.write( "Probability of 2 defect free batteries= 0.92*0.92=0.846.<BR>\n" );
document.write( "Probability of 3 defect free batteries= 0.92*0.92*0.92=0.779.<BR>\n" );
document.write( "Probability of 4 defect free batteries= 0.92*0.92*0.92*0.92=0.716.<BR>\n" );
document.write( "The probability is 71.6% that you'll have 4 defect free batteries.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );