According to a survey, 70 percent of the public likes coffee, and 80 percent likes tea.?

What are the upper and lower bounds of people who like both coffee and tea?

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  • H
    Lv 4
    9 years ago
    Favorite Answer

    coffee:0+both:70+tea:10+neither:20

    coffee:20+both:50+tea:30+neither:0

    At least that's the way it looks to me.

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