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1 A certain brand of light bulbs has lifetimes that are normally distributed with a...

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1 A certain brand of light bulbs has lifetimes that are normally distributed with a mean of 9000 hours and a standard deviation of 300 hours Bulbs that last less than 8436 hours are considered bad bulbs a Find the percentage of bad bulbs being manufactured 2 pts b Suppose that bulbs are packaged in boxes of 4 bulbs Find the probability that a random box contains exactly one bad bulb Round to four decimal places 2 pts C Find the probability that a box of 4 contains at least one bad bulb Round to four decimal places 2 pts 2 Suppose that a shipment of 700 boxes of 4 bulbs is made to a large business customer How many boxes would we expect to have at least one bad bulb in them 2 pts

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