# assume that the distribution of the cost of a room at the courtyard over a year can be approximated by a normal distribution with a mean of 130 and a standard deviation of 20.

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Subject: Mathematics    / Statistics
as a result of new attractions and marketing, the operating income of disney increased by 20 percent in the first half of 2004. Hotels at walt disney world village charge considerable more than local hotels, particularly during the summer months. the average rate for a room at the courtyard by Marriott at walt disney world village is 310. assume that the distribution of the cost of a room at the courtyard over a year can be approximated by a normal distribution with a mean of 130 and a standard deviation of 20.

what is the probability that the cost of a room on a randomly selected day is at least 115?

what is the probability that the cost of a room on a randomly selected day is between 110 and 150 between what two numbers, centered at 130 will the cost of the room be 80 percent of the time?

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