Mathematics, 05.05.2020 01:20, varia

The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Is this an unbiased
sample? If yes, suppose there are 684 students at the school. How many can be expected to prefer E-mail?

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The Student Council asked every tenth student in the lunch line how they preferred to be contacted w...