Question

9. Bag 1 contains 3 red and 4 black balls and bag 2 contains 4 red and 5
black balls. Two balls are transferred at random from bag 1 to bag 2 and
then a ball is drawn from bag 2. The ball so drawn is found to be red in
colour. Find the probability that the transferred balls were both black

Answer 1

The probability must be 5/9 of getting a black ball

Hope it is correct