Nine customers at a supermarket are asked independently if they use brand X laundry soap. In general,

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Nine customers at a supermarket are asked independently if they use brand X laundry soap. In general, 30% of the population use this brand. What is the probability that, among the nine, more than two people use brand X?
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Finite Mathematics and Its Applications

ISBN: 978-0134768632

12th edition

Authors: Larry J. Goldstein, David I. Schneider, Martha J. Siegel, Steven Hair

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