document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=987530>Question 987530</A>: <I><SPAN STYLE=\"word-break: break-all;\"> in a class that consists of 50, 35 use facebook,25 use instagram. a) what is the max/min number that use both.           b) suppose 20 students use both, if a student randomly selected, what is the probability that the student doesn't use either facebook or instagram? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #608279 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=608279\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> in a class that consists of 50, 35 use facebook,25 use instagram. a) what is the max/min number that use both. a) what is the max/min number that use both.<BR>\n" );
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document.write( "Draw two intersecting circles inside a rectangle.<BR>\n" );
document.write( "Label the circles F and I<BR>\n" );
document.write( "F = 35 ; I = 25<BR>\n" );
document.write( "Put \"x\" in the intersection.<BR>\n" );
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document.write( "a) what is the max/min number that use both.<BR>\n" );
document.write( "F has two sections: x and 35-x<BR>\n" );
document.write( "I has two sectiions: x and 25-x<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "35-x + x + 25-x <= 50<BR>\n" );
document.write( "60-x <= 50<BR>\n" );
document.write( "x >= 10<BR>\n" );
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document.write( "b) suppose 20 students use both, if a student randomly selected, what is the probability that the student doesn't use either facebook or instagram?<BR>\n" );
document.write( "20 in the intersection<BR>\n" );
document.write( "At most 30 are in the rectangle and not in F or I<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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