What is the probability that Ben commuted to work using a bicycle on only two days out of Monday, Tuesday and Wednesday? (Remember to consider all the possibilities!)
What is the probability that Ben commuted to work using a bicycle on only two days out of Monday, Tuesday and Wednesday? (Remember to consider all the possibilities!)
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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Transcribed Image Text:Ben commutes to work either with a bicycle or with a car, with equal probability of
choosing either.
What is the probability that Ben commuted to work using a bicycle on only two days
out of Monday, Tuesday and Wednesday? (Remember to consider all the
possibilities!)
3/4
3/8
1/8
Remember, we want the possibility that he uses a bicycle on two days. Therefore
the possibilities include using a bicycle on Monday and Tuesday but not Wednesday,
or using it on Tuesday and Wednesday but not Monday, or using it on Monday and
Wednesday not Tuesday. Those are the only conditions that we need to consider.
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