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#1 2011-02-14 00:38:11
- gAr
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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
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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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#3 2011-02-14 01:00:51
- gAr
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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
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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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#5 2011-02-14 01:25:03
- gAr
- Star Member
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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
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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
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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."