An urn contains 6 red, 5 blue and 2 green marbles. If three marbles are picked a

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An urn contains 6 red, 5 blue and 2 green marbles. If three marbles are picked at random, what is the probability that at least one is blue?

Options:

A . $$\frac{{28}}{{143}}$$

B . $$\frac{{115}}{{97}}$$

C . $$\frac{{28}}{{197}}$$

D . $$\frac{{115}}{{143}}$$

Answer: Option D

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