Technology on campus 2005 Every 5 years, the Confer-ence Board of the Mathematical Sciences surveys college math departments. In 2005, the board reported that 51%of all undergraduates taking Calculus I were in classesthat used graphing calculators and 21% were in classesthat used computer assignments. Suppose that 10% usedboth calculators and computers.a) What percent used neither kind of technology?b) What percent used calculators but not computers?c) What percent of the calculator users had computerassignments?d) Based on this survey, do calculator and computer useappear to be independent events? Explain.

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