document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=531051>Question 531051</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A sample of 4 different calculators is randomly selected from a group containing 16 that are defective and 31 that have no defects. What is the probability that at least one of the calculators is defective? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #350309 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=350309\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A sample of 4 different calculators is randomly selected from a group containing 16 that are defective and 31 that have no defects. What is the probability that at least one of the calculators is defective?<BR>\n" );
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document.write( "Binomial Problem with n = 4 ; p(defect) = 16/47 ; p(not) = 31/47<BR>\n" );
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document.write( "P(at least 1 defect) = 1 - P(none of 4 is defect)<BR>\n" );
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document.write( "= 1 - (31/47)^4<BR>\n" );
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document.write( "= 0.8107<BR>\n" );
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document.write( "Chyeers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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