document.write( "Question 390993: 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? \n" ); document.write( "

Algebra.Com's Answer #277293 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,         
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document.write( "P(choosing one red from the full bag) = 10/13
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document.write( "P(choosing 2 red, replacing the first) = 10/13*10/13 = 100/169 = .5917\r
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document.write( "Note: w/o replacement, that is, first red marble gone from bag:  P = 10/13*9/12 \n" );
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