Posted by **nicole** on Saturday, April 10, 2010 at 8:35pm.

A bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?

- Math probability -
**bobpursley**, Saturday, April 10, 2010 at 8:39pm
Pr(both red)=10/13*10/13

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