Mathematics, 14.07.2020 17:01, bellamore
Visitors to a cinema are either children, adults or pensioners. The ratio of children to adults is 2:5. The ratio of adults to pensioners is 3:4. A stratified sample of 315 is to be taken from the visitors. How many pensioners should be in the sample?
Answers: 2
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Visitors to a cinema are either children, adults or pensioners. The ratio of children to adults is 2...
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