MHB Probability that a person's birthdate is in the given range

AI Thread Summary
The discussion centers on calculating the probability of a birthday falling between January 20th and 29th. To find this probability, one must determine the number of favorable outcomes (birthdays in the specified range) and divide it by the total outcomes (all possible birthdays in January). The thread emphasizes the importance of clearly stating questions and providing attempted solutions for better guidance. The user is encouraged to engage with the math problem more thoroughly to facilitate assistance. Understanding the basic principles of probability is essential for solving such questions effectively.
Nunu
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If a person's birthday is in January, what are the odds that it is between the 20th and the 29th, inconclusively?
A. 10/31
B. 8/21
C. 21/31
H. 10/21

Thanks(Sun)
 
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Hello and welcome to MHB! :D

First, I want to point out a couple of issues...I moved your thread from the Chat Room to our Basic Probability forum as this is a better fit for your question. The Chat Room is for informal discussions about pretty much anything, and we ask that actual math problems be posted in the appropriate forum so that MHB is more useful for everyone.

Your original thread title did not indicate anything about the nature of your question. Again, doing so makes MHB more useful for everyone.

Lastly, we do ask that you show what you tried so that we can see where you are stuck and/or where you may be going wrong, and then we can offer guidance to get you unstuck.

Okay, now let's look at the problem. We know that the probability will be the number of favorable outcomes divided by the total number of outcomes.

Favorable outcomes: How many ways can a person's birthday be in the given rage?

Total outcomes: How many ways can a person have a birthday in January?
 

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