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Is the bottled water you’re drinking really purified water? A study of various brands of bottled...

Is the bottled water you’re drinking really purified water? A study of various brands of
bottled water conducted by the Natural Resources Defense Council found that 23% of bottled water is just tap water packaged in a bottle. Consider a sample of 15 bottled-
water brands (sampled independently). What is the probability that at least 2 contain tap water?

math   Statistics-And-Probability   
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