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Which of the following is closest to the percent increase in the total school enrolment from 1990 to 2000?
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For the high school enrollment in 2000, which of the following is closest to the ratio of the enrollment of population group $$A$$ to the sum of the enrollments of population groups $$B$$ and $$C$$?
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Two students are to be selected at random at the same time from the total school enrollment in 1960. Which of the following is closest to the probability that both students will be students who were enrolled in high school in 1960?
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Approximately what was the average value traded per investor in the five categories for 2001?
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The number of investors who traded in category $$E$$ was approximately what percent less than the number who traded in category $$C$$?
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If 35 percent of the investors traded in both category $$A$$ and category $$B$$, what percent of the investors traded in neither of these two categories?
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For which of the following pairs of years did the ratio of total donations from individuals to total donations from organizations for one of the years exceed that for the other year by the greatest amount?
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For how many of the years from 2007 to 2010 were the total donations from individual and the total donations from organizations in that year each greater than the corresponding total donations in the preceding year?
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If the average (arithmetic mean) of the total donations from individuals for the years from 2008 to 2012 was $343,000, what was the average of the total donations from individuals for the years 2011 and 2012?
$______ thousand
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In Vermont the number of acres of forest area in 1992 was $$76.5$$ percent of the total number of acres of land area. Which of the following is closest to the number of millions of acres of land area in Vermont?
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For Maine, which of the following is closest to the average annual increase in the number of acres of forest area from 1907 to 1992?
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The number of acres of forest area in Rhode Island in 1992 was what percent greater than it was in 1907?
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The median salary for assistant professors lies in which of the following intervals?
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Approximately what percent of the full professors had a salary of $110,000 or greater?
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If the average (arithmetic mean) salary of the full professors whose salaries were in the interval $50,000-$120,000 was $$x$$, and if the average salary of the full professors whose salaries were $120,000 and above was $$y$$, what was the average salary of all the full professors, in terms of $$x$$ and $$y$$?
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