67. Suppose that 90% of all batteries from a certain supplier have acceptable voltages. A certain type
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67. Suppose that 90% of all batteries from a certain supplier have acceptable voltages. A certain type of ashlight requires two type-D batteries, and the ashlight will work only if both its batteries have acceptable voltages. Among ten randomly selected ashlights, what is the probability that at least nine will work? What assumptions did you make in the course of answering the question posed?
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Related Book For 
Modern Mathematical Statistics With Applications
ISBN: 9780534404734
1st Edition
Authors: Jay L Devore
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