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The figure shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution corresponding to the six regions shown.

The discrete random variable V is approximately normally distributed with a mean of 500 and a standard deviation of 100. If 10,200 of the values of V are between 500 and 600, what is the best estimate of the number of values of V that are less than 400?
If the responses summarized in the table represent an 80 percent return from the total number of departments receiving the survey questionnaire, how many departments received the survey questionnaire?
If a department uses exactly 2 of the types of software, how many different pairs are possible?
What is the greatest possible number of responding departments that could be using both exploratory and symbolic manipulation software packages?
Bank X calculates a customer satisfaction index for the Web site after the redesign. Responses of "very satisfied" are each assigned a value of 3, responses of "somewhat satisfied" are each assigned a value of 2, responses of "somewhat dissatisfied" are each assigned a value of 1, and responses of “very dissatisfied" are each assigned a value of 0. The customer satisfaction index is the average (arithmetic mean) of the values. Which of the following is closest to the customer satisfaction index for the Web site after the redesign?
One of the 200 customers is to be selected at random. What is the probability that the customer will be one who was very satisfied with the Web site after the redesign and whose favorite feature was easy transfers?
The number of customers who were very satisfied with the Web site after the redesign is approximately what percent greater than the number of customers who were very satisfied with the Web site before the redesign? Give your answer to the nearest whole percent.
Let a represent the increase from 1992 to 1999 in the total value of public and private construction, let b represent the corresponding increase from 1999 to 2006, and let c represent the corresponding increase from 2006 to 2013. Which of the following statements is true?
In 2013 the value of construction for highways was approximately how much greater than the value of construction for industrial buildings?
Of the following pairs of types of construction in 2013, where the first type is a public type and the second type is a private type, which pair had dollar values that were closest to each other?
The average (arithmetic mean) of 6 different positive integers is 12, and x is the greatest of these integers. What is the greatest possible value of $$x$$?

Quantity A

The number of different positive odd factors of 10

Quantity B

The number of different positive even factors of 10
When the integer $$n$$ is divided by 33, the remainder is 18. Which of the following must be a divisor of $$n$$?
Bank $$X$$ calculates a customer satisfaction index for the Web site after the redesign. Responses of "very satisfied" are each assigned a value of 3, responses of "somewhat satisfied" are each assigned a value of 2, responses of "somewhat dissatisfied" are each assigned a value of 1, and responses of “very dissatisfied" are each assigned a value of 0. The customer satisfaction index is the average (arithmetic mean) of the values. Which of the following is closest to the customer satisfaction index for the Web site after the redesign?
One of the 200 customers is to be selected at random. What is the probability that the customer will be one who was very satisfied with the Web site after the redesign and whose favorite feature was easy transfers?

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