An urn contains 2 red, 3 green and 2 blue balls. If 2 balls are drawn at random, find the probability that no ball is blue.

An urn contains 2 red, 3 green and 2 blue balls. If 2 balls are drawn

1.	An urn contains 2 red, 3 green and 2 blue balls. If 2 balls are drawn at random, find the probability that no ball is blue.
A.	$\frac{5}{7}$$
B.	$\frac{10}{21}$$
C.	$\frac{2}{7}$$
D.	$\frac{11}{21}$$
E.	one of these
Answer» C. $\frac{2}{7}$$

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An urn contains 2 red, 3 green and 2 blue balls. If 2 balls are drawn at random, find the probability that no ball is blue.

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