document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1155530>Question 1155530</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains 3 red and 7 green marbles. If 9 marbles are drawn without replacement, what is the expected number of red marbles? </SPAN>\n" );
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document.write( "When 9 marbles are drawn without replacement, there is one marble left.<br><BR>\n" );
document.write( "The probability that 3 red marbles are drawn -- i.e., that the remaining marble is green -- is 7/10; similarly, the probability that 2 red marbles are drawn is 3/10.<br><BR>\n" );
document.write( "The expected number of red marbles drawn is then<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%287%2F10%29%2A3%2B%283%2F10%29%2A2+=+27%2F10+=+2.7 ALIGN=MIDDLE  ALT=\"%287%2F10%29%2A3%2B%283%2F10%29%2A2+=+27%2F10+=+2.7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
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