Before burning out a light bulb gives x hours of light

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1. The daily demand for milk (in gallons) at Gillis Grocery is N(1,000, 100). How many gallons must be in stock at the beginning of the day if Gillis is to have only a 5% chance of running out of milk by the end of the day?

2. Before burning out, a light bulb gives X hours of light, where X is N(500, 400). If we have 3 bulbs, what is the probability that they will give a total of at least 1,460 hours of light?

Reference no: EM13578715

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