A box has 5 white and 2 red balls. Another box has 3 whit and 4 red

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Question:

A box has 5 white and 2 red balls. Another box has 3 whit and 4 red balls. One ball is randomly selected from the first box and it is transferred to the second box. After that, one ball is randomly drawn from the second box. Find the probability that it is red.