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Mathematics, 17.12.2019 06:31 duyphan
Asurvey company asks all respondents for demographic information. there are 8 age and 7 income groups, 5 gender choices, and 6 choices for ethnicity. how many people would this company have to poll so it’s inevitable that at least three people in the sample have identical demographic information? give the number and explain.
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Answers: 2
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