Posted by b on Sunday, March 3, 2013 at 8:24am.
A box contains four red, three blue, and six green lenses. Two lenses are randomly selected from the box. Find the probability of getting two red lenses when two are selected if the first selection is NOT replaced before the second selection is made.

math  bobpursley, Sunday, March 3, 2013 at 8:43am
Pr=4/(13)*3/12=1/13
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