Qhov tshwm sim ntawm xaiv liab lossis xiav marble yog dab tsi?
Qhov tshwm sim ntawm xaiv liab lossis xiav marble yog dab tsi?

Video: Qhov tshwm sim ntawm xaiv liab lossis xiav marble yog dab tsi?

Video: Qhov tshwm sim ntawm xaiv liab lossis xiav marble yog dab tsi?
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Cov Qhov tshwm sim ntawm kev kos duab liab marble = 2/5. Cov Qhov tshwm sim ntawm kev kos duab ib xiav marble yog tam sim no = 1/4. Cov Qhov tshwm sim ntawm kev kos duab liab marble = 2/5.

Tsuas yog li ntawd, qhov tshwm sim ntawm qhov tau txais liab lossis xiav marble yog dab tsi?

Yog ib xiav marble tau xaiv ua ntej muaj tam sim no 1/4 caij nyoog tau txais ib xiav marble thiab 3/4 muaj feem tau txais liab marble . Yog ib liab marble tau xaiv ua ntej muaj tam sim no 2/4 caij nyoog tau txais ib xiav marble thiab 2/4 muaj feem tau txais liab marble.

Qhov thib ob, qhov tshwm sim yog dab tsi uas marble kos yog ntsuab lossis xiav? Cov qhov tshwm sim rau kos ib ntsuab marble yog 9/20 = 0.45. Yog ob marbles yog kos ntawm random yam tsis hloov thiab ib zaug ib zaug, ces tus qhov tshwm sim uas ib tug liab thiab lwm tus yog xiav 0,25x 0.

Kuj Paub, qhov tshwm sim ntawm xaiv marble uas tsis yog xiav yog dab tsi?

Piv txwv li, yog tias cov qhov tshwm sim ntawm kev xaiv ib red marble los ntawm ib lub thawv uas muaj 4 liab marbles thiab 6 xiav marbles yog 4/10 los yog 2/5, ces tus qhov tshwm sim ntawm tsis xaiv ib red marble yog sib npaug rau 1 - 4/10 = 6/10 los yog 3/5, uas kuj yog qhov tshwm sim ntawm kev xaiv ib xiav marble.

Qhov yooj yim yuav tshwm sim yog dab tsi?

Basic Cov tswv yim ntawm Qhov yuav tshwm sim . A qhov tshwm sim yog tus lej uas qhia txog lub caij nyoog los yog qhov tshwm sim uas yuav tshwm sim. Qhov yuav tshwm sim tuaj yeem nthuav tawm raws li kev faib ua feem ntau ntawm 0 txog 1, thiab lawv tuaj yeem nthuav tawm raws li feem pua ntawm 0% mus rau 100%.

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