JEE Math Practice Question
Three urns A, B and C contain 7 red, 5 black; 5 red, 7 black and 6 red, 6 black balls, respectively. One of the urn is selected at random and a ball is drawn from it. If the ball drawn is black, then the probability that it is drawn from urn $$\mathrm{A}$$ is :
- A.$$\frac{4}{17}$$
- B.$$\frac{5}{16}$$
- C.$$\frac{5}{18}$$
- D.$$\frac{7}{18}$$
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