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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 156<br />

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Diskretne slučajne spremenljivke<br />

Zaloga vrednosti diskretne slučajne spremenljivke X je ˇstevna mnoˇzica<br />

{x1, x2, . . . , xm, . . .}. Dogodki<br />

X = xk k = 1, 2, . . .<br />

sestavljajo popoln <strong>si</strong>stem dogodkov. Označimo verjetnost posameznega<br />

dogodka s<br />

P (X = xi) = pi.<br />

Vsota verjetnosti vseh dogodkov je enaka 1:<br />

p1 + p2 + · · · + pm + · · · = 1.<br />

Univerza v Ljubljani ▲<br />

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