JD - thats not quite right. Try this example: A man has 20 children. He tells you 19 are boys. What is the probability the last one of them is a boy to?
1/2.
John Doe
JoinedPosts by John Doe
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101
A riddle my brother gave me today
by bohm ina man has 2 children.
he tells you one is a boy born on a tuesday.
what is the probability the other is a boy to?.
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John Doe
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101
A riddle my brother gave me today
by bohm ina man has 2 children.
he tells you one is a boy born on a tuesday.
what is the probability the other is a boy to?.
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John Doe
Albert is right - its lower than 1/2.
You're going to have to give an explanation. As your puzzle stands, I can see no way of construing that as less than 1/2.
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52
Unitarian Universalism
by changeling inhas anyone here gone that route?
i've been reading up on them and they sound interesting.
they even accept atheists!
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John Doe
I hate Axe nauseating scents. But I like their advertisements.
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101
A riddle my brother gave me today
by bohm ina man has 2 children.
he tells you one is a boy born on a tuesday.
what is the probability the other is a boy to?.
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John Doe
But if it is a boy, he must be born any other day than Tuesday so it only gives 6/7 chance (There already is one born on Tuesday ...)
Nothing in the story supports that the other child must be born on a day other than Tuesday. And, even if that were stipulated, it would have no bearing on the sex of the other child. That's merely superfluous information to distract you.
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101
A riddle my brother gave me today
by bohm ina man has 2 children.
he tells you one is a boy born on a tuesday.
what is the probability the other is a boy to?.
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John Doe
The probability of one child being a boy is 1/2. The probability of two childs being boys is 1/2 x 1/2, or 1/4. However, since we know that one child is a boy, that only leaves us with the probability of one child being a boy. So, the answer is 1/2.
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29
Found: Octagon Soap!
by snowbird in.
my oldest daughter heard me speak of it, and alerted me to the fact that she'd seen some at a little, hole-in-the-wall store.. hallelujah!.
syl.
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John Doe
Pink it´s my new obsession. Pink it´s not even a question. Pink on the lips of your lover, ´cause pink is the love you discover. Pink as the bing on your cherry. Pink ´cause you are so very. Pink it´s the color of passion, `cause today it just goes with the fashion
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52
Unitarian Universalism
by changeling inhas anyone here gone that route?
i've been reading up on them and they sound interesting.
they even accept atheists!
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John Doe
Absolutely.
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52
Unitarian Universalism
by changeling inhas anyone here gone that route?
i've been reading up on them and they sound interesting.
they even accept atheists!
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John Doe
I'll let you all worship me if you want--I'll even accept atheists, so long as you have money. And a tight booty.
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29
Found: Octagon Soap!
by snowbird in.
my oldest daughter heard me speak of it, and alerted me to the fact that she'd seen some at a little, hole-in-the-wall store.. hallelujah!.
syl.
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John Doe
I like pleasure spiked with pain and music is my aeroplane; it's my aeroplane--pleasure spiked with pain.
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29
Found: Octagon Soap!
by snowbird in.
my oldest daughter heard me speak of it, and alerted me to the fact that she'd seen some at a little, hole-in-the-wall store.. hallelujah!.
syl.
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John Doe
Soap is soap.