One version of the birthday problem is as follows: How many people need to be in a room such that there is a greater than 50% chance that 2 people share the same birthday. This is an interesting question as it shows that probabilities are often counter-intuitive. The answer is that you only need 23 people before you have a 50% chance that 2 of them share a birthday. So, why do you only need 23 people?

One version of the birthday problem is as follows: How many people need to be in a room such that there is a greater than 50% chance that 2 people share the same birthday. This is an interesting question as it shows that probabilities are often counter-intuitive. The answer is that you only need 23 people before you have a 50% chance that 2 of them share a birthday. So, why do you only need 23 people?

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

One version of the birthday problem is as follows:
How many people need to be in a room such that there is a greater than
50% chance that 2 people share the same birthday.
This is an interesting question as it shows that probabilities are often
counter-intuitive. The answer is that you only need 23 people before you
have a 50% chance that 2 of them share a birthday. So, why do you only
need 23 people?

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