Dab tsi yog qhov xwm txheej ywj pheej tshwm sim?
Dab tsi yog qhov xwm txheej ywj pheej tshwm sim?

Video: Dab tsi yog qhov xwm txheej ywj pheej tshwm sim?

Video: Dab tsi yog qhov xwm txheej ywj pheej tshwm sim?
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Hauv qhov tshwm sim , ob xwm txheej yog ywj siab yog tias qhov tshwm sim ntawm ib qho xwm txheej tsis cuam tshuam rau qhov tshwm sim ntawm lwm tus xwm txheej . Yog qhov tshwm sim ntawm ib xwm txheej puas cuam tshuam rau qhov tshwm sim ntawm lwm tus xwm txheej , tiam xwm txheej nyob ntawm. Muaj ib tug liab 6-sab ncaj ncees tuag thiab ib tug xiav 6-sab ncaj ncees tuag.

Tsuas yog li ntawd, dab tsi yog kev ywj pheej tshwm sim?

Thaum ob txheej xwm hais tias yuav ywj siab ntawm ib leeg, qhov no yog dab tsi txhais tau tias yog tus qhov tshwm sim tias ib qho xwm txheej tshwm sim nyob rau hauv tsis muaj txoj kev cuam tshuam rau qhov tshwm sim ntawm lwm qhov xwm txheej tshwm sim. Ib qho piv txwv ntawm ob ywj siab xwm txheej yog raws li nram no; hais tias koj dov ib tug tuag thiab flipped ib npib.

Dab tsi yog cov xwm txheej ywj pheej thiab nyob ntawm qhov tshwm sim? Peb hu xwm txheej nyob yog paub tias ib tug tshwm sim qhia peb ib yam dab tsi txog seb lwm tus tshwm sim. Cov xwm txheej ywj pheej tsis pub peb paub txog ib leeg; tus qhov tshwm sim ntawm ib xwm txheej tshwm sim tsis cuam tshuam rau qhov tshwm sim ntawm lwm tus xwm txheej tshwm sim.

Nyob rau hauv no hais txog, koj yuav ua li cas paub yog hais tias ib qho kev tshwm sim yog ywj siab?

Mus kuaj seb ob xwm txheej A thiab B yog ywj siab , suav P(A), P(B), thiab P(A ∩ B), thiab xyuas seb P(A ∩ B) sib npaug P(A) P(B). Yog lawv sib npaug, A thiab B yog ywj siab ; yog tsis yog, lawv nyob.

Koj pom qhov tshwm sim ntawm ntau yam xwm txheej li cas?

Qhov yuav tshwm sim ntawm ob Cov xwm txheej tshwm sim ua ke: Independent Cia li multiply qhov tshwm sim ntawm thawj xwm txheej los ntawm qhov thib ob. Piv txwv li, yog tias cov qhov tshwm sim ntawm xwm txheej A yog 2/9 thiab qhov tshwm sim ntawm xwm txheej B yog 3/9 ces tus qhov tshwm sim ntawm ob leeg xwm txheej 2/9 * (3/9) = 6/81 = 2/27.

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