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#1 2012-12-17 02:19:48

jacks
Member
Registered: 2012-11-21
Posts: 77

probability

Two no. are selected from the set

without replacement one by one .

Then the probability that minimum of 2 no. is

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#2 2012-12-17 02:42:16

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,748

Re: probability

Hi jacks;

Fairly simple to just enumerate:

If I draw a six, I have 3 numbers to pick, same for a 5 and a 4. So that is 3 * 3 = 9

If I draw a 3, I have 5 numbers to pick, same with 2 and 1. So 3 * 5 = 15.

Probability is 4 / 5.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#3 2012-12-17 02:45:39

jacks
Member
Registered: 2012-11-21
Posts: 77

Re: probability

Thanks bobbym

But I did not understand the meaning of minimum of 2 no. is < 4 (whta does it mean)

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#4 2012-12-17 02:57:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,748

Re: probability

Say you pick a 6 and then a 4, remember without replacement means no two numbers are the same.

The minimum of a 6 and a 4 is 4. It means the smallest value out of the two numbers picked.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#5 2012-12-17 03:00:02

jacks
Member
Registered: 2012-11-21
Posts: 77

Re: probability

Thanks bobbym got it

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#6 2012-12-17 03:02:47

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,748

Re: probability

Okay, you are welcome.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

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