3. If A, B and D are three events in a sample space where An B = 0 and AU B = S, show that P(D) = P(D|A)P(A) + P(D|B)P(B) 4. If A and B are two events, prove that P(B|A)P(A) P(A|B) : P(B|A)P(A) + P(B|A)P(A)

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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3. If A, B and D are three events in a sample space where AnB = 0 and AU B =
S, show that
P(D) = P(D|A)P(A) + P(D|B)P(B)
4. If A and B are two events, prove that
P(B|A)P(A)
P(A|B) :
P(B\A)P(A) + P(B|A)P(A)
Transcribed Image Text:3. If A, B and D are three events in a sample space where AnB = 0 and AU B = S, show that P(D) = P(D|A)P(A) + P(D|B)P(B) 4. If A and B are two events, prove that P(B|A)P(A) P(A|B) : P(B\A)P(A) + P(B|A)P(A)
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