A Bag contains 5 red and 2 green balls. One ball is drawn at random. If the drawn ball is red, then a green ball is added in the bag. If the drawn ball is green, then a red ball is added to the urn find the probability that this ball is red.
Let, A: Event of drawing a red ball and placing a green ball in the bag.
B: Event of drawing a green ball and placing a red ball in the bag.
c: Event of drawing a red ball in the second draw.
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