document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=145233>Question 145233</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321361466/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I am having trouble trying to figure out how to work this probability problem. Could anyone please help me with these? Thank you so much! \r<BR>\n" );
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document.write( "After a particularly brilliant Super Bowl ad, a company believes that 78% of all adults (18 and older) recognize their brand.\r<BR>\n" );
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document.write( "a.  If we sample adults, what’s the probability that the first or the second does not recognize the brand?<BR>\n" );
document.write( "b.  If we sample adults, what’s the probability that the 3rd person asked is the first one who doesn’t recognize the brand? \r<BR>\n" );
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document.write( "~Lyn </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #105897 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=105897\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> After a particularly brilliant Super Bowl ad, a company believes that 78% of all adults (18 and older) recognize their brand; therefore 22% do not.<BR>\n" );
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document.write( "a. If we sample adults, what’s the probability that the first or the second does not recognize the brand?<BR>\n" );
document.write( "P(both do not recognize their brand) = = 0.22^2 = 0.0484<BR>\n" );
document.write( "P(both recognize their brand) = 0.78^2 = 0.6084<BR>\n" );
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document.write( "Therefore P(one or other does not recognize their brand) = 1-(0.0484 + 0.6084)<BR>\n" );
document.write( "= 0.3432<BR>\n" );
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document.write( "b. If we sample adults, what’s the probability that the 3rd person asked is the first one who doesn’t recognize the brand? <BR>\n" );
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document.write( "Prob (do followed by do followed by don't) = (0.78)(0.78)(0.22) = 0.133848..<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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