document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1195775>Question 1195775</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the indicated probabilities. about 30% of U.S. adults are trying to lose weight. you randomly select eight U.S. adults. find the probability that the number of U.S. adults who say they are trying to lose weight is (a) exactly three, (b) at least three, and (c) more than three </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #828310 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=828310\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is binomial because n is fixed, assume constant probability and independence of random samples.<BR>\n" );
document.write( "a. 8C3*0.3^3*0.7^5=0.2541<BR>\n" );
document.write( "b. look at 0,1,2<BR>\n" );
document.write( "for 0 it is 0.7^8=0.0576<BR>\n" );
document.write( "for 1 it I 8*0.3*0.7^7=0.1977<BR>\n" );
document.write( "for 2 it is 28*0.3^2*0.7^6=0.2965<BR>\n" );
document.write( "The sum of those is 0.5088<BR>\n" );
document.write( "so at least 3 is everything else or 1-0.5088 or 0.4912 .<BR>\n" );
document.write( "c. More than 3 is 0.4912-0.2541, which is exactly 3=0.2371 </SPAN>\n" );
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