An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If 4 marbles are picked up at random, what is the probability that at least one of them is blue?

An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If 4 marb

1.	An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If 4 marbles are picked up at random, what is the probability that at least one of them is blue?
A.	$\frac{4}{15}$$
B.	$\frac{69}{91}$$
C.	$\frac{11}{15}$$
D.	$\frac{22}{91}$$
E.	one of these
Answer» C. $\frac{11}{15}$$

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An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If 4 marbles are picked up at random, what is the probability that at least one of them is blue?

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