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Anonymous No. 16065884

Suppose you have an infinite line of the positive integers. You have a machine that selects one at random, all numbers have an equal chance of being chosen.

How likely is it that you select an integer that belongs to the first 5 000 000 integers?

Anonymous No. 16065897

>>16065884
>infinite
stopped reading there

Anonymous No. 16065905

>>16065884
Does the machine operate on a function of addition subtraction multiplication or division?

Anonymous No. 16065913

>>16065884
Easy.
5,000,000/โˆž = 0
So 0% chance

Anonymous No. 16065928

>>16065905
I dunno, your choice.

>>16065913
How far does this 0% chance extend then?

Anonymous No. 16065930

>>16065884
You're going to have to define "at random" because I don't know what you mean by it.

Anonymous No. 16065933

>>16065884
>all numbers have an equal chance of being chosen.
>>16065913
>So 0% chance

Anonymous No. 16066051

>>16065930
An arbitrary integer between 0 and infinity

Anonymous No. 16066079

>>16065928
>How far does this 0% chance extend then?
everywhere, since every number is finite

Anonymous No. 16066099

As the number of integers increases, the likelihood of selecting any given number approaches 0. Of course your hypothetical number machine would have a chance of getting <5 000 000, but with an infinite number of leading digits behind it, each with a 90% chance of being nonzero (and therefore making the number >5 000 000), there is an infinity*0.9 chance that the number will be >5 000 000. Infinity times 0.9 is still infinity, so there is an infinite chance that the number is >5 000 000

Anonymous No. 16066118

>>16065884
between 0% and -0%

Anonymous No. 16066167

{1,...,n} is a finite set and the natural numbers are infinite. So, if a natural number is chosen uniformly at random, the probability is 0 that it will be an element of {1,...,n}.

Anonymous No. 16066174

>random
You keep using that word, but I don't think you know what it means

Anonymous No. 16066177

>>16066051
That doesn't mean anything. In particular, that doesn't mean a probability measure because there isn't one with equal chances on the integers. At [math]Pr[n] = 0[/math] for each [math]n[/math] it would still violate violate the countable additivity requirement. So, go on, define "arbitrary" precisely enough for the question to be answered.

Anonymous No. 16066603

>>16065913
>5,000,000/โˆž = 0
Multiplying both sides by โˆž we get:
5,000,000 = 0
which is incorrect.

Anonymous No. 16066691

>>16065884
>all numbers have an equal chance of being chosen.
false assumption

Anonymous No. 16066694

the machine needs infinite resources to make the choice. it will always blow the fuck up before making a choice thus making all numbers have a 0% chance of being chosen.

Anonymous No. 16067564

>>16065897
Tsmt

Anonymous No. 16067572

>>16065884
100% chance
>you have a machine that selects one at random
So my machine already selected 1.

Anonymous No. 16067978

>>16066051
If the selection is arbitrary, then the chance is also arbitrary.

๐Ÿ—‘๏ธ Anonymous No. 16068004

[math]P(A=n\le5000000|B=n\sim U(- \infty, \infty)), n\in\mathbb{Z}[/math]

Anonymous No. 16068023

[math]P(A=n\le5,000,000|B=n\sim U(0,\infty)), n\in\mathbb Z[/math]

Anonymous No. 16068029

>>16066694
This is the real answer. Everyone else is having a psychosis