Im struggling with this function: P(A ∪ B) = P(A) + P(B) - P(A ∩ B) when you search for the venn diagram the union of two sets the middle part is also colored so why do we subtract the intersection in the formula?

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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Im struggling with this function:

P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

when you search for the venn diagram the union of two sets the middle part is also colored so why do we subtract the intersection in the formula? 

A
D
B
AUB
U
Transcribed Image Text:A D B AUB U
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