In a class of 80 students, sixty percent use neither an iPhone nor an iPad. Twenty percent use an iPhone, while thirty percent use an iPad. a.) How many students in this class are using an iPhone or an iPad? b.) How many students in this class are using both an iPhone and an iPad?

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter14: Counting And Probability
Section14.CT: Chapter Test
Problem 4CT: Over the past year, John has purchased 30 books. a In how many ways can he pick four of these books...
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In a class of 80 students, sixty percent use neither an iPhone nor an iPad. Twenty percent use an iPhone, while thirty percent use an iPad. a.) How many students in this class are using an iPhone or an iPad? b.) How many students in this class are using both an iPhone and an iPad?
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