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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2007
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Two radioactive substances A and B have decay constants 5λ and λ respectively. At t=0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1e)2 after a time interval :-


( A ) 12λ
( B ) 4λ
( C ) 2λ
( D ) 14λ
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