document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=728393>Question 728393</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An Adweek Media/Harris Poll revealed that 44% of US adults in the 18-34 years category think that \"Made in America\" ads boost sales.  <BR>\n" );
document.write( "A different Harris Interactive poll showed that 78% of US adults in the 18-34 years category use social media online.  <BR>\n" );
document.write( "Suppose that 85% of US adults in the 18-34 years category think that \"Made in America\" ads boost sales  or use social media online.  <BR>\n" );
document.write( "If a US adult in the 18-34 years category is randomly selected a. <BR>\n" );
document.write( "What is the probability that the person thinks \"Made in America\" ads boost sales AND uses social media on-line & \r<BR>\n" );
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document.write( "b. What is the probability that the person thinks that \"Made in America ads boost sales given that the person does not use social media on-line?<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 #445470 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=445470\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A) 44% of US adults in the 18-34 years category think that \"Made in America\" ads boost sales.<BR>\n" );
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document.write( "B) 78% of US adults in the 18-34 years category use social media online.<BR>\n" );
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document.write( "Suppose that 85% of US adults in the 18-34 years category think that \"Made in America\" ads boost sales  OR use social media online.<BR>\n" );
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document.write( "If a US adult in the 18-34 years category is randomly selected<BR>\n" );
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document.write( "a. What is the probability that the person thinks \"Made in America\" ads boost sales AND uses social media on-line & <BR>\n" );
document.write( "Ans: P(A AND B) = P(A)+P(B)-P(A or B) = 0.44+0.78-0.85 = 0.37<BR>\n" );
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document.write( "b. What is the probability that the person thinks that \"Made in America ads boost sales given that the person does not use social media on-line?<BR>\n" );
document.write( "P(A | B) = P(A and B)/P(B) = 0.37/0.78 = 0.4744<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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