document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=717749>Question 717749</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One professor grades homework by randomly choosing 3 out of 15 homework problems to grade How many different groups of 3 problems can be chosen from the 15 problems?<BR>\n" );
document.write( " Probability extension: Jerry did only 3 problems of one assignment. What is the probability that the problems he did comprised the group that was selected to be graded? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #440481 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=440481\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> One professor grades homework by randomly choosing 3 out of 15 homework problems to grade How many different groups of 3 problems can be chosen from the 15 problems?<BR>\n" );
document.write( "Probability extension: Jerry did only 3 problems of one assignment. What is the probability that the problems he did comprised the group that was selected to be graded?<BR>\n" );
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document.write( "# of ways to succeed: 1<BR>\n" );
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document.write( "# of sets of 3 questions: 15C3 = 455<BR>\n" );
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document.write( "P(his 3 are selected) = 1/455<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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