Suppose that 50 identical batteries are bing tested after 8, Ask an Expert

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Suppose that 50 identical batteries are bing tested. After 8 hours of continuous use, assume that a given batter is still operating with a probability of .70 and has failed with probability of .30.

What is the probablity that fewer than 40 batteries will last at least 8 hours?

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Category:- Statistics and Probability
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