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Mathematics 7 Online
OpenStudy (anonymous):

5 red balls and 6 black balls are in a bag. Find the probability that in two draws a red ball and a black ball are chosen. No replacement of names is done after a draw

OpenStudy (kc_kennylau):

Red->Black + Black->Red

OpenStudy (kc_kennylau):

What's your attempt? :)

OpenStudy (anonymous):

could you pls explain me

OpenStudy (kc_kennylau):

Puedes calcular la probabilidad de obtener: 1. primero una pelota roja entonces una pelota negra, y 2. primero una pelota negra entonces una pelota roja, entonces sumas los valores juntos. Si tengas preguntas, preguntame :)

OpenStudy (kc_kennylau):

(Can you read Spanish)

OpenStudy (kc_kennylau):

ok i have to go now, others people will help you if you still don't understand

OpenStudy (anonymous):

ok good

OpenStudy (anonymous):

the probability is 30/110

OpenStudy (anonymous):

do you know what a conditional probability is?

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