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What is the probability that a randomly chosen contestant tried singing into the ground or charmed 21-30 worms?

What is the probability that a randomly chosen contestant tried singing into the ground or charmed 21-30 worms?

A First Course in Probability (10th Edition)
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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Benjamin attended his town's annual Worm Charming Competition. Contestants are assigned to a square foot of land, where they have 30 minutes to "charm" worms to the surface of the dirt using a single technique. Benjamin observed contestants' charming techniques, and kept track of how many worms surfaced. The probability that a contestant tried singing into the ground is 0.5, the probability that a contestant charmed 21- 30 worms is 0.2 and the probability that a contestant tried singing into the ground and charmed 21-30 worms is 0.1. What is the probability that a randomly chosen contestant tried singing into the ground or charmed 21-30 worms?
Transcribed Image Text:Benjamin attended his town's annual Worm Charming Competition. Contestants are assigned to a square foot of land, where they have 30 minutes to "charm" worms to the surface of the dirt using a single technique. Benjamin observed contestants' charming techniques, and kept track of how many worms surfaced. The probability that a contestant tried singing into the ground is 0.5, the probability that a contestant charmed 21- 30 worms is 0.2 and the probability that a contestant tried singing into the ground and charmed 21-30 worms is 0.1. What is the probability that a randomly chosen contestant tried singing into the ground or charmed 21-30 worms?
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