document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=386745>Question 386745</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 34% of people in the US have type A+ blood.  You randomly select 73 people in the US and ask them if their blood type is A+.\r<BR>\n" );
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document.write( "A.  Use the binomial formula to calculate the probability that between 9 and 12 people (inclusive will say they have A+ blood.\r<BR>\n" );
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document.write( "B.  Find the probability that at least 30 of these people will say they have A+ blood.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #273346 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=273346\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 34% of people in the US have type A+ blood. You randomly select 73 people in the US and ask them if their blood type is A+.<BR>\n" );
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document.write( "Binomial Problem with n = 73 and p = 0.34<BR>\n" );
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document.write( "A. Use the binomial formula to calculate the probability that between 9 and 12 people (inclusive will say they have A+ blood.<BR>\n" );
document.write( "P(9<= x <=12) = binomcdf(73,0.34,12)-binomcdf(73,0.34,8) = 0.0006644<BR>\n" );
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document.write( "B. Find the probability that at least 30 of these people will say they have A+ blood.<BR>\n" );
document.write( "P(30<= x <=73) = 1 - P(73,0.34,29) = 0.1245<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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