Help me with my statistics/Math problem:

[SSAlexSS]

Help me out here guys. ]

I got this problem.


out of 50,000 marbles of all different colors and 4000 of same color , those4,000 marbles of the same color were removed from the same bag without looking. What is probability of that happening? No replacement is done.

please reply, thanks.


How probable i that?

 

[teresand77]

how many different colors did you start out with in the bag?

 

[Norman Bates]

Do you mean that 4000 times a marble is drown ,then put back and drawn again?

 

[flex123]

I use to know how to do this....I think it was a rather simple equation.

4,000 marbles out of 30,000 would be 16,000/30,000 + 4,000/30,000=the probabilty

atleast I think.

 

[HumorMe]

Hey....Great! A karma thread. Hit me!

 

[flex123]

Hey....Great! A karma thread. Hit me!

why he said green marbles? if so whats the probability of me getting hit with green if 300 people view this thread?

 

[Warik]

The probability is 0.

You said they were all different colors, so no two are alike, so it is impossible for 2 identical ones to be drawn, much less 4,000.

-Warik

 

[flex123]

The probability is 0.

You said they were all different colors, so no two are alike, so it is impossible for 2 identical ones to be drawn, much less 4,000.

-Warik

just re-read his original question....he said it was removed 4,000 times. so he had to pick the same marble out and put it back and do this 4,000 times.

 

[Warik]

Nope. That's not what he said.

out of 30,000 marbles of all different colors

Which means 30,000 marbles each having a different color.

4,000 marbles of the same color were removed

Meaning 4,000 marbles all of which had the same color. Also, he used "were" instead of "was," indicating that a multiple number of marbles were removed simultaneously rather than 1 marble 4,000 times.

He never said anything about putting marbles back in. Even if he did, the color aspect would be irrelevant to the question because we'd be talking about one marble as opposed to a group of colored marbles. Plus the answer would be so ridiculously easy (1/30000)^4000 that it wouldn't even be worth asking.

We have not been given enough information to answer whatever the real question is.

-Warik

 

[Serenity Head]

probability of once=1/30000
prob of twice=1/30000*1/30000 ect

so (1/30000)^4000 is the occurence of this event.

I am in genetics, this is a rather routine type of problem.

 

[Fonz]

Nope. That's not what he said.



Which means 30,000 marbles each having a different color.



Meaning 4,000 marbles all of which had the same color. Also, he used "were" instead of "was," indicating that a multiple number of marbles were removed simultaneously rather than 1 marble 4,000 times.

He never said anything about putting marbles back in. Even if he did, the color aspect would be irrelevant to the question because we'd be talking about one marble as opposed to a group of colored marbles. Plus the answer would be so ridiculously easy (1/30000)^4000 that it wouldn't even be worth asking.

We have not been given enough information to answer whatever the real question is.

-Warik

I agree with Warik.

I think he copied down the question incorrectly.

It makes no sense the way he posted it.

Fonz

 

[Warik]

I agree with Warik.

I think he copied down the question incorrectly.

It makes no sense the way he posted it.

Fonz

We agree on something? Wtf?

Don't make me change my answer.

-Warik

 

[SSAlexSS]

Help me out here guys. ]

I got this problem.


out of 30,000 marbles of all different colors , 4,000 marbles of the same color were removed from the same bag without looking. What is probability of that happening?

please reply, thanks.

Corrections

50,000 with 4000 marbles of same color. 4000 were missing, all of the same color (no replacement).

How probable i that?

 

[SSAlexSS]

The probability is 0.

You said they were all different colors, so no two are alike, so it is impossible for 2 identical ones to be drawn, much less 4,000.

-Warik

ooopps... I am horrible at this.



4000 of marbles were the same color, the rest are different.

 

[Fonz]

Re: Re: Help me with my statistics/Math problem:

Corrections

50,000 with 4000 marbles of same color. 4000 were missing, all of the same color (no replacement).

How probable i that?

Ok then, then its easy.

The answer is just 4/50 or 2/25 = 8%

If they're ALL of the same colour then they HAVE to be the 4000 of the same colour in the 50,000 marbles.

Probability of that is just 4/50 or 2/25

Fonz

 

[sigweed]

my question is what role did these marbles have in 9/11?

 

[Bullit]

Re: Re: Re: Help me with my statistics/Math problem:

Ok then, then its easy.

The answer is just 4/50 or 2/25 = 8%

If they're ALL of the same colour then they HAVE to be the 4000 of the same colour in the 50,000 marbles.

Probability of that is just 4/50 or 2/25

Fonz

Oh I think its a lot harder than that.

I think he's asking:
There are 50,000 marbles.
46,000 are different colors. 4,000 are the same color.
What are the odds of pulling out all 4000 of the same color in a row (no replacements).

 

[Warik]

muhahaha Fonz is wrong again.

50,000 marbles.

4,000 of the same color. 4,000 are drawn. What's the probability of them all being the same color?

4000/50000 * 3999/49999 * 3998/49998 .... * 1/46000 = ??? I don't feel like calculating it ???.

Using your math, the probability of drawing 4 aces from a deck of cards would be 4/52, when we both know it's much less likely than that.

-Warik