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Given that P(A or B) = 1, P(A) = 1, and P(A and B) = 1, find P(B).

Given that P(A or B) = 1, P(A) = 1, and P(A and B) = 1, find P(B).

Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CR: Review Exercises
Problem 39CR: In the figure, A-B-C. If AB=x, BC=x+7, and AC=4x-3 find x.
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Hi,

Could you please help me understand how you came to a fraction answer for this question? Thank you.

Given that P(A or B) = 1, P(A) = 1, and P(A and B) = 1, find P(B).
Transcribed Image Text:Given that P(A or B) = 1, P(A) = 1, and P(A and B) = 1, find P(B).
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Follow-up Question

I see..we need to minus the 1/4 because it represents A and we are looking for B.

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Follow-up Question

You are literally taking 1/3 and changing it to 13

1/4= 14 and 1/8= 18?

So it's P(b)+ p (A or B) - p (A)?

Why do you change the fractions the way you did, could you please help me understand this portion.

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