MaiiR01
24.10.2019 •
Mathematics
Replacement times for tv sets are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years (consumer reports). find the probability that a randomly selected tv will have a replacement time less than 5.0 years. if you want to provide a warranty so that only 1% of the tv sets will be replaced before the warranty expires, what is the time length of the warranty?
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Ответ:
1. Distribute the 4 into (2x-1). 5x + 2 = 3x + 8x - 4.
2. Add the like terms. 5x + 2 = 11x - 4.
3. Subtract 5x on both sides. 2 = 6x - 4.
4. Add 4 on both sides. 6 = 6x
5. Divide 6 on both sides. x = 1