1.

Birth rate means (1) The number of live births for every 1000 persons in a year (2) The number of live births for every 100 persons in a year (3) The number of live births_ for every 1000 persons in a decade (4)The number of live births for every 100 persons in a decade

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(1) The number of live births for every 1000 persons in a year 



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