Probability Quiz

Navy9 · Postby **Navy9** » Thu Jul 17, 2008 11:35 am

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

ORGEONES · Postby **ORGEONES** » Thu Jul 17, 2008 11:44 am

siren · Postby **siren** » Thu Jul 17, 2008 11:44 am

The probability is 2 out of 3! :mrgreen:

RebelLion · Postby **RebelLion** » Thu Jul 17, 2008 11:46 am

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.

siren · Postby **siren** » Thu Jul 17, 2008 11:52 am

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:

ms.nalia · Postby **ms.nalia** » Thu Jul 17, 2008 11:55 am

Does the mom count?

RebelLion · Postby **RebelLion** » Thu Jul 17, 2008 11:55 am

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!

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.

ORGEONES · Postby **ORGEONES** » Thu Jul 17, 2008 11:58 am

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

siren · Postby **siren** » Thu Jul 17, 2008 12:01 pm

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!

you probably cheated

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:

Navy9 · Postby **Navy9** » Thu Jul 17, 2008 12:24 pm

ms.nalia wrote:Does the mom count?

Siren and Rebel got it right :up:

siren · Postby **siren** » Thu Jul 17, 2008 3:14 pm

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

Siren and Rebel got it right

I knew I was right! :mrgreen:

RebelLion · Postby **RebelLion** » Thu Jul 17, 2008 3:17 pm

siren

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

siren · Postby **siren** » Thu Jul 17, 2008 3:20 pm

RebelLion wrote:siren

I explained how I came with the answer, you just had a lucky guess.

RebelLion You're such a hater! :down:

RebelLion · Postby **RebelLion** » Thu Jul 17, 2008 3:27 pm

siren

okay fine, you deserve credit you genius quruxley. :rose:

siren · Postby **siren** » Thu Jul 17, 2008 3:31 pm

RebelLion wrote:siren

okay fine, you deserve credit you genius quruxley.

Don't pacify me! :mrgreen:

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