Latest Others Aptitude Question SOLUTION: Q. One bag contains 5 white and 4 black balls.Another bag contains 7 white and 9 black balls.A ball is transferred from first bag to second and then a ball is drawn from the secon

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(#M40018543) OTHERS question Probability Keep an EYE

Q. One bag contains 5 white and 4 black balls.Another bag contains 7 white and 9 black balls.A ball is transferred from first bag to second and then a ball is drawn from the second bag.Find the probability that the ball drawn is white.

Option
A)7/18
B)5/9
C)4/9
D)11/18

Asked In Others Sumit Rawal (10 years ago)

Solved vinod Read Solution (2)

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Read Solution (2) :

vinod  (10 years ago)

here 2 cases::
1) transferred ball is white
then choosing that white ball from 1st bag is 5/9
and now there are 8 white,9 black in 2nd bag
so prob of choosing white from 2nd is=(5/9)*(8/17)....(1)
2) let the ball transferred is black with prob 4/9
in the same way as above,, prob is (4/9)*(7/17).........(2)

reqd prob is (1)+(2)=4/9

Is this solution Helpfull? Yes (3) | No   

pappu gupta  (10 years ago)

4/9 is d ansr

Is this solution Helpfull? Yes | No (1)  

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