If one order is selected, find the probability of getting an order from McDonald's or an order that is accurate.  Are the events of selecting an order from McDonald's and selecting an accurate order disjoint event?

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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If one order is selected, find the probability of getting an order from McDonald's or an order that is accurate.  Are the events of selecting an order from McDonald's and selecting an accurate order disjoint event?

McDonald's  Order Accurate 329; Order Not Accurate 33.

Burger King's Order Accurate  264; Order Not Accurate 54.

Wendy's Order Accurate 249; Order Not Accurate 31.

Taco Bell Order Accurate 145; Order No Accurate 13.

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