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Half-lives of two radioactive substances A and Barerespectively 20 minutes and 40 minutesInitially - thesamples of A and B have equal number of nucleiAfter80 minutes the ratio of remaining numbers of A and Bnuclei is [1998

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Half-lives of two radioactive substances A and Barerespectively 20 minutes and 40 minutesInitially - thesamples of A and B have equal number of nucleiAfter80 minutes the ratio of remaining numbers of A and Bnuclei is [1998






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