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QUESTION
A light bulb company knows the lifetime of 10,000 bulbs is normally distributed. The mean lifetime of a bulb is 8 months, and the standard deviation...
A light bulb company knows the lifetime of 10,000 bulbs is normally distributed. The mean lifetime of a bulb is 8 months, and the standard deviation is 1.5 months. Approximately, how many bulbs will last more than 10 months?
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