Imagine a man on the grid below. A path is considered to be "valid' if it consists only "go right" and "go up"(hence the walker will reach B in 10 steps). This man starts at Node A and take a "valid" path to reach B. Assume a valid path is taken randomly, with each path having equal probability to be chosen. (a) Find the probability of that the man passes by Node S. (b) Given that the man passes by Node S, find the condition probability of passing by T.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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Imagine a man on the grid below. A path is considered to be "valid' if it consists only "go
right" and "go up"(hence the walker will reach B in 10 steps). This man starts at Node A and
take a "valid" path to reach B. Assume a valid path is taken randomly, with each path having
equal probability to be chosen.
(a) Find the probability of that the man passes by Node S.
(b) Given that the man passes by Node S, find the condition probability of passing by T.
В
T
S
A
Transcribed Image Text:Imagine a man on the grid below. A path is considered to be "valid' if it consists only "go right" and "go up"(hence the walker will reach B in 10 steps). This man starts at Node A and take a "valid" path to reach B. Assume a valid path is taken randomly, with each path having equal probability to be chosen. (a) Find the probability of that the man passes by Node S. (b) Given that the man passes by Node S, find the condition probability of passing by T. В T S A
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