You are not logged in.
#1 2011-02-14 00:38:11
- gAr
- Star Member
Offline
Probability, 2 fair coins
Hi all,
2 fair coins are flipped and atleast one of the outcomes is known to be a head., what is the probability that both outcomes are head?
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
#2 2011-02-14 00:45:53
- bobbym
- Administrator
Online
Re: Probability, 2 fair coins
Hi;
Looks good to me!
If you want to get confused about this go here.
http://trickofmind.com/?p=439
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#3 2011-02-14 01:00:51
- gAr
- Star Member
Offline
Re: Probability, 2 fair coins
Hi bobbym,
Thanks for looking into it, and thanks for the link!
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
#4 2011-02-14 01:11:10
- bobbym
- Administrator
Online
Re: Probability, 2 fair coins
Hi;
Just be careful some of those guys at that link are wrong.
Here is a pdf that you can download that covers the math and answers that question.
http://www.cse.buffalo.edu/~atri/course … lect4.pdf.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#5 2011-02-14 01:25:03
- gAr
- Star Member
Offline
Re: Probability, 2 fair coins
Hi,
yes, I verify before accepting any answer!
Thanks for this link too.
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
#6 2011-02-14 22:54:46
- Howardroark
- Power Member
Offline
Re: Probability, 2 fair coins
Hi gAr,
gAr wrote:
2 fair coins are flipped and atleast one of the outcomes is known to be a head., what is the probability that both outcomes are head?
You are right.. Here's a problem similar to yours..
A couple has 2 children. One of them is a girl. What is the probability that the other is a girl?
I come from a civilization which has given the world the number 0..
#7 2011-02-15 01:59:10
- gAr
- Star Member
Offline
Re: Probability, 2 fair coins
Hi Howardroark,
Thanks for looking into the problem.
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."