Question

A bag contains 4 white and 5 black balls. Another Bag contains 9 white

and 7 black balls. A ball is transferred from first bag to the second and

then a ball is drawn at random from second bag. Find the probability that

ball drawn is white.

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Answer 1

Answer:

This is the correct answer

Step-by-step explanation:

A= Event that white ball transferred

B= Event that black ball transferred

C= Event that ball drawn from secondary bag is white

⇒P ( ball drawn is white ) =P ( white ball transferred ) P ( Ball drawn white ) +P ( black ball transferred ) ×P ( ball drawn white )

=

9

4

×

14

7

+

9

5

×

14

6

=

126

28+30

=

126

58

Hence, the answer is

126

58

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.

Answer 2

Answer:

13/25

Step-by-step explanation:

when the balls are transferred

total no.of white balls = 4+9=13

total no. of plack balls=5+7=12

total balls=13+12=25

probability of getting a white ball = 13/25

hope it helps :)