Quiz on Naive Bayes

How to solve this question : Two urns 1 and 2 contains 3 red & 4 black balls, 2 red & 5 black balls respectively. A ball is transferred from urn 1 to urn 2 and then a ball is drawn from urn 2. If the ball is found to be red find the probability that the ball transferred from urn 1 is black.

Use Bayes Theorum to solve it.

but I am not able to apply the formula of bayes theorem

What’s the issue the you’re facing?

can you pls solve the question?

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