document.write( "Question 28924: how do I solve probability of compound events like this:\r
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\n" ); document.write( "\n" ); document.write( "if this is the problem:\r
\n" ); document.write( "\n" ); document.write( "A student is selected at random from a group of male and female students in the seventh, eighth, or ninth grade.
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Algebra.Com's Answer #15804 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Prob (male or ninth grader)=Prob(male)+Prob(ninth grader)-Prob (male and ninth grader)
\n" ); document.write( "Notice: \"male and ninth grader\" means a ninth grader who is male.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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