In a class, 40% of the students offered Statistics, 30% offered Mathematics, and 20% offered both. If a student is selected at random, what is the probability that he has offered Mathematics or Statistics?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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In a class, 40% of the students offered Statistics, 30% offered Mathematics, and 20% offered both. If a student is selected at random, what is the probability that he has offered Mathematics or Statistics? 

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