What is the probability that 20 or more customers chose the leading brand?

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The leading brand of dishwasher detergent has a 30% market share. A sample of 25 dishwasher detergent customer was taken. What is the probability that 20 or more customers chose the leading brand?

    • 10 years ago
    What is the probability that 20 or more customers chose the leading brand?
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    • diswasher.doc