When Shana looked at the favorites list on her boyfriend's smartphone, there were 10 songs she liked, 7 songs she'd heard but did not like, and 5 songs she hadn't heard. She let the phone pick a song at random. What is the probability that the selected song was one she liked or one she'd heard but did not like?

When Shana looked at the favorites list on her boyfriend's smartphone, there were 10 songs she liked, 7 songs she'd heard but did not like, and 5 songs she hadn't heard. She let the phone pick a song at random. What is the probability that the selected song was one she liked or one she'd heard but did not like?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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