Bounds for Coffee and Tea Drinkers
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A survey asked 100 respondents two questions:
- Do you like tea?
- Do you like coffee?
70% of respondents said they liked coffee, and 80% of the respondents said they liked tea. Only 10% of respondents said they liked neither.
Based on this survey, what are the upper and lower bounds for the proportion of the population that like tea and coffee?
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