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Mathematics, 27.09.2019 09:10 kernlife

Bernice wants to know which ice cream parlor is the most popular among students at her school. which samples are random for this population and which are not?

four people from each of bernice's classes

every sixth person at bernice's favorite ice cream parlor

every third girl that walks by the school cafeteria

two people from every class during fourth period at bernice's school

every fifth person that walks by the school library

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