document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1033688>Question 1033688</A>: <I><SPAN STYLE=\"word-break: break-all;\"> take 100 set of 10 tosses of an unbiased coin. in how many cases do u expect to get 7 heads at least\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #648366 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=648366\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> take 100 sets of 10 tosses of an unbiased coin. 1<BR>\n" );
document.write( "in how many cases do u expect to get 7 heads at least<BR>\n" );
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document.write( "For each set of 10 tosses you have a binomial problem<BR>\n" );
document.write( "with n = 10 and p(heads) = 1/2<BR>\n" );
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document.write( "P(7<= x <= 10) = 1-P(0<= x <= 6) = 1-binomcdf(10,1/2,6) = 0.1718<BR>\n" );
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document.write( "Since the probabilities for each of the 100 sets are independent<BR>\n" );
document.write( "the expected # of sets with at least 7 heads is 0.1718 *100 = 17<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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