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A bag contains 1 white and 6 red balls, and a second bag contains 4 white and 3 red balls. One of the bags is picked up at random and a ball is random

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A bag contains 1 white and 6 red balls, and a second bag contains 4 white and 3 red balls. One of the bags is picked up at random and a ball is randomly drawn from it, and is found to be white in colour. Find the probability that the drawn ball was from the first bag. Select the correct answer from above options

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probability of white ball from bag1 =>`1/7` probability of white ball from bag2=>`4/7` probability it was bag 1=>`(1/7)/(1/7+4/7)=1/5`

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