A merchant surveyed 380 people to determine the way they learned about an upcoming sale. The survey showed that 160 learned about the sale from the radio, 160 from television, 140 from the newspaper, 90 from radio and television, 30 from radio and newspapers, 40 from television and newspapers, and 20 from all three sources. How many people learned of the sale from newspapers or radio, but not both?

A merchant surveyed 380 people to determine the way they learned about an upcoming sale. The survey showed that 160 learned about the sale from the radio, 160 from television, 140 from the newspaper, 90 from radio and television, 30 from radio and newspapers, 40 from television and newspapers, and 20 from all three sources. How many people learned of the sale from newspapers or radio, but not both?

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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