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 2 years ago
This question is related to probability, please help ASAP!!!
Bag A contains 3 red balls and 3 blue balls.
Bag B contains 1 red ball and 3 blue balls.
Q: a ball is taken at random from bag A and placed in bag B. Then a ball is chosen from bag B. What is probability that the ball taken from bag B is red... Explain the logic... i know the answer but i dont know the logic behind it please help
 2 years ago
This question is related to probability, please help ASAP!!! Bag A contains 3 red balls and 3 blue balls. Bag B contains 1 red ball and 3 blue balls. Q: a ball is taken at random from bag A and placed in bag B. Then a ball is chosen from bag B. What is probability that the ball taken from bag B is red... Explain the logic... i know the answer but i dont know the logic behind it please help

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Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.2What's the probability that the ball you remove is red if you added a red ball from bag A?

Sufiyancs
 2 years ago
Best ResponseYou've already chosen the best response.0am i right? @Jemurray3

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.2Yes, that's right. What's the probability that the ball you remove is red if you added a blue ball from bag A?

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.2Lastly, what's the probability that you picked a red marble from bag A? Or a blue one?

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.2Okay. So the two ways you can end up with a red marble at the end are: (1) Move a red one from bag A to bag B, and then pick a red one from bag B (2) Move a blue one from bag A to bag B, and then pick a red one from bag B

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.2The probability of the first one is (1/2) * (2/5) and the probability for the second one is (1/2) * (1/5). Since both sequences give us a red one at the end, you add the probabilities to get the final answer.

Sufiyancs
 2 years ago
Best ResponseYou've already chosen the best response.0yea i know that but the part i didnt understand is why are we multiplying 1/2 with each possibility

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.2Because that's the probability of choosing a red or blue marble from bag A to begin with.

Sufiyancs
 2 years ago
Best ResponseYou've already chosen the best response.0ok its is but why multiplying

Sufiyancs
 2 years ago
Best ResponseYou've already chosen the best response.0@cwrw238 read and just answer my last comment plz

Sufiyancs
 2 years ago
Best ResponseYou've already chosen the best response.0@jim_thompson5910 read and just answer my last comment plz

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.2If you want the probability that you have event A and also event B, you multiply the respective probabilities.

Sufiyancs
 2 years ago
Best ResponseYou've already chosen the best response.0ohh thanx it was very helpful @Jemurray3
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