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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 100<br />

✬<br />

. . . Računanje z dogodki<br />

Mnoˇzico dogodkov S = {A1, A2, . . . , An} imenujemo popoln <strong>si</strong>stem<br />

dogodkov, če se v vsaki ponovitvi poskusa zgodi natanko eden od dogodkov<br />

iz mnoˇzice S.<br />

To pomeni, da so v<strong>si</strong> mogoči<br />

paroma nezdruˇzljivi<br />

in njihova vsota je gotov dogodek<br />

Ai = N,<br />

Ai ∩ Aj = N i = j<br />

A1 ∪ A2 ∪ . . . ∪ An = G.<br />

Primer: Popoln <strong>si</strong>stem dogodkov pri metu kocke sestavljajo na primer<br />

osnovni dogodki ali pa tudi dva dogodka: dogodek, da vrˇzem sodo ˇstevilo<br />

pik, in dogodek, da vrˇzem liho ˇstevilo pik.<br />

✫<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

▲<br />

✩<br />

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