Three persons A,B and C shoot to hit a target.If in trials,A hits the target 4 times in 5 shots,B hits 3 times in 4 shots and C hits 2 times in 3 trials.Find the probability that :

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(a) Exactly two persons hit the target. (b) At least two persons hit the target. This question has multiple parts. Therefore each part has been answered as a separate question on Clay6.com