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Question

An urn contains $$7$$ white, $$5$$ black and $$3$$ red balls. Two are drawn at random. Find the probability that one ball is white.

A

$$\dfrac {11}{15}$$

B

$$\dfrac {7}{15}$$

C

$$\dfrac {8}{15}$$

D

$$\dfrac {4}{15}$$

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Solution

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Correct option is D. $$\dfrac {8}{15}$$

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