Mathematics, 30.03.2020 13:25 zaiinab

Visitors to a cinema are either children, adults or pensioners. The ratio of children to adult visitors is 1:2. The ratio of adults to pensioners is 3:4. A stratified sample of 85 is to be taken from the cinema visitors. How many pensioners should be in the sample?

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Visitors to a cinema are either children, adults or pensioners. The ratio of children to adult visit...

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