Sample space: a list of cells, not a list of fates

Probability is “event / sample space.” Miscount the space and the story collapses. keno-vs-lotto-odds, euromillions-vs-lotto6, and powerball-vs-lotto6 are other URLs. This essay is the definition itself.

Sets

6/45 first is usually an unordered 6-set.

Two urns

Powerball and EuroMillions add a second urn.

Keno

Different n,k. Tonight is the operator.

We do not sell

No universal space poster.

6/45 space

6/45 firstC(45,6)=8,145,060
BonusOther urn
IndependentPast does not reweight
SystemWe do not sell

Arithmetic, not a winning tip.

Related

FAQ

Is every lottery 8,145,060?
No. That is a 6/45 line.
Numbers?
No.
Prediction?
No.
A formula workbook?
A definition note.

For entertainment and arithmetic. Combinatorics, bias, and expected value are not a winning tip or investment advice. Draws are random.

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