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The temperature X outside an office at midday on a randomly chosen day in February can be modelled by a normally distributed random variable with

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The temperature X outside an office at midday on a randomly chosen day in February can be modelled by a normally distributed random variable with a mean of 24 C and a standard deviation of 3.8 0C. The air-conditioning inside the office is set to turn on when it is colder than 17 0C or warmer than 21 0c. What is the probability that the air-conditioning is running? Select one: O a. 0.3178 O b. 0.8178 O C. 0.6822 O d. 0.1822

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