An officer walks into a computer room where there are no students present. He notices that there are two Windows computers, and all other computers run Linux. As he leaves the room, four students enter. They uniformly randomly go and sit at four computers to work at. Our officer is clever: • he determines that the probability that all students sit at Linux computers is A; . He determines that the probability that two of the four students sit at the windows computer is B; After that, the officer was very surprised to find that A = B! How many computers are in the computer room
An officer walks into a computer room where there are no students present. He notices that there are two Windows computers, and all other computers run Linux. As he leaves the room, four students enter. They uniformly randomly go and sit at four computers to work at. Our officer is clever: • he determines that the probability that all students sit at Linux computers is A; . He determines that the probability that two of the four students sit at the windows computer is B; After that, the officer was very surprised to find that A = B! How many computers are in the computer room
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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Question
An officer walks into a computer room where there are no students present. He notices that there are two Windows computers, and all other computers run Linux. As he leaves the room, four students enter. They uniformly randomly go and sit at four computers to work at.
Our officer is clever:
• he determines that the probability that all students sit at Linux computers is A;
. He determines that the probability that two of the four students sit at the windows computer is B;
After that, the officer was very surprised to find that A = B!
How many computers are in the computer room?
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