There are 2 bags. 1st bag contains 6 white and 6 blue balls. 2nd bag contains 5 white and 7 black balls. One ball is taken at random from first bag and put to second bag without noticing its colour. Now a ball is chosen at random from 2nd bag. What is the probability of the second ball being a white colour ball?

There are 2 bags. 1st bag contains 6 white and 6 blue balls. 2nd bag c

1.	There are 2 bags. 1st bag contains 6 white and 6 blue balls. 2nd bag contains 5 white and 7 black balls. One ball is taken at random from first bag and put to second bag without noticing its colour. Now a ball is chosen at random from 2nd bag. What is the probability of the second ball being a white colour ball?
A.	11 13
B.	6 13
C.	5 13
D.	5 12
E.	None of htese
Answer» B. 6 13

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