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A purse contains 4 copper coins and 3 silver coins, the second purse contains 6 copper coins and 2 silver coins.

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A purse contains 4 copper coins and 3 silver coins, the second purse contains 6 copper coins and 2 silver coins. If a coin is drawn out of any purse, then the probability that it is a copper coin is 

(A) 4/7 

(B) 3/4 

(C) 37/56 

(D) None of these

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Answer is (C) 37/56

Required probability = 1/2.4/7 + 1/2.6/8 = 37/56

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