document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=444879>Question 444879</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I just can't seem to get this probability thing.  Can you please show me how to do these:\r<BR>\n" );
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document.write( "1:  In the rainforest you are visiting, there is a 50% chance of rain each day.  Find the probability of rain on all of the next 4 days.  \r<BR>\n" );
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document.write( "2:  Each trial of an experiment has a probability of success p.  Find the probability of x successes in n trials.  <BR>\n" );
document.write( "A: p=0.3, x=4, n=6<BR>\n" );
document.write( "B: p=0.9, x=5, n=7\r<BR>\n" );
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document.write( "I am beyond lost.  Please help!\r<BR>\n" );
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document.write( "Thank you\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 #306591 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=306591\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1: In the rainforest you are visiting, there is a 50% chance of rain each day. Find the probability of rain on all of the next 4 days.<BR>\n" );
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document.write( "Ans: (0.50)^4 = 0.0625<BR>\n" );
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document.write( "2: Each trial of an experiment has a probability of success p. Find the probability of x successes in n trials. <BR>\n" );
document.write( "A: p=0.3, x=4, n=6<BR>\n" );
document.write( "P(x=4) = 6C4(0.3)^4(0.7)^2 = binompdf(6,0.3,4) = 0.01536<BR>\n" );
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document.write( "B: p=0.9, x=5, n=7<BR>\n" );
document.write( "P(x= 5) = 7C5(0.8)^5*(0.2)^2 = binompdf(7,0.9,5) = 0.1240<BR>\n" );
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document.write( "I used a TI-84 to get the numbers.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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