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out of 20consecutive numbers ,two are chosen at random, the probability that their sum is odd is (1)9/10 , (2)11/20, (3)10/19,(4)10/21

Answer» out of 20consecutive numbers ,two are chosen at random, the probability that their sum is odd is (1)9/10 , (2)11/20, (3)10/19,(4)10/21


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