Probability Quiz

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Navy9
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Probability Quiz

Post by Navy9 »

A random two-child family with at least one boy is chosen. What is the probability that it has a girl?
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ORGEONES
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Re: Probability Quiz

Post by ORGEONES »

1/2
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siren
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Re: Probability Quiz

Post by siren »

The probability is 2 out of 3! :mrgreen:
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RebelLion
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Re: Probability Quiz

Post by RebelLion »

I've seen this question b4 in a stats class, it's two thirds. Only three possibilities with at least a boy, and out the the three possibilities, 2 out the three has a girl.
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Re: Probability Quiz

Post by siren »

RebelLion wrote:I've seen this question b4 in a stats class, it's two thirds. Only three possibilities with at least a boy, and out the the three possibilities, 2 out the three has a girl.

I answered it before you, gimmie credit for that you fathead! :mrgreen:
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Re: Probability Quiz

Post by ms.nalia »

Does the mom count? :mrgreen:
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RebelLion
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Re: Probability Quiz

Post by RebelLion »

siren wrote:
RebelLion wrote:I've seen this question b4 in a stats class, it's two thirds. Only three possibilities with at least a boy, and out the the three possibilities, 2 out the three has a girl.

I answered it before you, gimmie credit for that you fathead! :mrgreen:
you probably cheated :down:

I actually hated probability, it's good think I don't use it much in my field but I was forced to take a class for my undergrad.
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ORGEONES
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Re: Probability Quiz

Post by ORGEONES »

four possible combination:

boy, boy
boy, girl
girl, girl
girl, boy

first child is a boy, this eliminates,

boy, boy
girl, boy


Answer= 1/2
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Re: Probability Quiz

Post by siren »

RebelLion wrote:
siren wrote:
RebelLion wrote:I've seen this question b4 in a stats class, it's two thirds. Only three possibilities with at least a boy, and out the the three possibilities, 2 out the three has a girl.

I answered it before you, gimmie credit for that you fathead! :mrgreen:
you probably cheated :down:

I actually hated probability, it's good think I don't use it much in my field but I was forced to take a class for my undergrad.
Why should I cheat? it was easy, it took you a while to break it down though! :roll:
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Navy9
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Re: Probability Quiz

Post by Navy9 »

ms.nalia wrote:Does the mom count? :mrgreen:

:lol: :lol: :lol:


Siren and Rebel got it right :up:
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siren
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Re: Probability Quiz

Post by siren »

Navy9 wrote:
ms.nalia wrote:Does the mom count? :mrgreen:

:lol: :lol: :lol:


Siren and Rebel got it right :up:
I knew I was right! :mrgreen:
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Re: Probability Quiz

Post by RebelLion »

siren :D

I explained how I came with the answer, you just had a lucky guess. :down:
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Re: Probability Quiz

Post by siren »

RebelLion wrote:siren :D

I explained how I came with the answer, you just had a lucky guess. :down:
RebelLion You're such a hater! :down:
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Re: Probability Quiz

Post by RebelLion »

siren

okay fine, you deserve credit you genius quruxley. :rose: :D
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Re: Probability Quiz

Post by siren »

RebelLion wrote:siren

okay fine, you deserve credit you genius quruxley. :rose: :D
Don't pacify me! :mrgreen:
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