Posted by kk on Thursday, November 5, 2009 at 7:18pm.
a group has 6 fifthgraders, 7 sixthgraders, & 4 eighthgraders. One member of the group will win a prize. Describe the chances that the winner will be a sixthgrader

math  bobpursley, Thursday, November 5, 2009 at 7:22pm
Pr(sixth)= 6/(6+7+4)
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