A box contains 3 red and 4 blue marbles. Two marbles are drawn without replacement. What is the probability that the second marble is red if it is known the first marblel is red?

A box contains 3 red and 4 blue marbles. Two marbles are drawn without

1.	A box contains 3 red and 4 blue marbles. Two marbles are drawn without replacement. What is the probability that the second marble is red if it is known the first marblel is red?
A.	( frac {3}{7} )
B.	( frac {4}{7} )
C.	( frac {1}{3} )
D.	( frac {1}{7} )
Answer» D. ( frac {1}{7} )

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A box contains 3 red and 4 blue marbles. Two marbles are drawn without replacement. What is the probability that the second marble is red if it is known the first marblel is red?

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