document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1037650>Question 1037650</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am not getting probability at all or where to start.<BR>\n" );
document.write( "It says \"The following histograms each represent binomial distributions. Each distribution has the same number of trials n but different probabilities of success p.\" It lists three graphs P(x). and has a probability formula of P(x)=nCxp^xq^n-x<BR>\n" );
document.write( "And it says match p=0.3, p=0.5, p=0.6 with the correct graph. \r<BR>\n" );
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document.write( "Where do I start? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #652368 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=652368\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> nCx and c(n,x) mean the same thing.<BR>\n" );
document.write( "they are the combination formula that tells you how many sets of x out of n you can get where order doesn't matter.\r<BR>\n" );
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document.write( "the formula for nCx or c(n,x) is n! / (x! * (n-x)!)\r<BR>\n" );
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document.write( "the formula for the probability of x successes out of n possibilities is:\r<BR>\n" );
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document.write( "p(x) = c(n,x) * p^x * q^(n-x)\r<BR>\n" );
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document.write( "p(x) is the probability of x successes.<BR>\n" );
document.write( "c(n,x) is the combination formula of how many sets of x you can get out of n possible choices.<BR>\n" );
document.write( "p^x is the probability of success raised to the power of x.<BR>\n" );
document.write( "q is the probability of failure raised to the power of (n-x).\r<BR>\n" );
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document.write( "q is equal to 1 - p.\r<BR>\n" );
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document.write( "when p = .3, q = .7<BR>\n" );
document.write( "when p = .5, q = .5<BR>\n" );
document.write( "when p = .6, q = .4\r<BR>\n" );
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document.write( "not being able to see the graphs, i'm not exactly sure what you are looking at.\r<BR>\n" );
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document.write( "the mean is usually n*p<BR>\n" );
document.write( "the standard deviation is usually sqrt(n*p*q)<BR>\n" );
document.write( "the variance is usually the square of the standard deviation = n*p*q\r<BR>\n" );
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document.write( "if you can send me a picture of the graphs and possibly the complete wording of the problem i might be able to figure it out.\r<BR>\n" );
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