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QUESTION 6 Khai Bahar Electronics manufactures LED light bulbs for refrigerator and microwave oven. The company claims that the life span of the bulbs follow

QUESTION 6 Khai Bahar Electronics manufactures LED light bulbs for refrigerator and microwave oven. The company claims that the life span of the bulbs follow a normal distribution with mean of 1500 hours and a standard deviation of 110 hours. Find the probability that a randomly chosen bulb has a life span of less than 1400 hours. (2 marks) ii) Find the probability that a randomly chosen bulb has a life span of between 1300 and 1600 hours. (3 marks) If 10% of the bulbs have life span of at least k hours, find k

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