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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
 one year ago
 one year 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
 one year ago
 one year ago

This Question is Closed

Jemurray3Best ResponseYou've already chosen the best response.2
What's the probability that the ball you remove is red if you added a red ball from bag A?
 one year ago

SufiyancsBest ResponseYou've already chosen the best response.0
am i right? @Jemurray3
 one year ago

Jemurray3Best ResponseYou've already chosen the best response.2
Yes, that's right. What's the probability that the ball you remove is red if you added a blue ball from bag A?
 one year ago

Jemurray3Best ResponseYou've already chosen the best response.2
Lastly, what's the probability that you picked a red marble from bag A? Or a blue one?
 one year ago

Jemurray3Best ResponseYou've already chosen the best response.2
Okay. 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
 one year ago

Jemurray3Best ResponseYou've already chosen the best response.2
The 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.
 one year ago

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

Jemurray3Best ResponseYou've already chosen the best response.2
Because that's the probability of choosing a red or blue marble from bag A to begin with.
 one year ago

SufiyancsBest ResponseYou've already chosen the best response.0
ok its is but why multiplying
 one year ago

SufiyancsBest ResponseYou've already chosen the best response.0
@cwrw238 read and just answer my last comment plz
 one year ago

SufiyancsBest ResponseYou've already chosen the best response.0
@jim_thompson5910 read and just answer my last comment plz
 one year ago

Jemurray3Best ResponseYou've already chosen the best response.2
If you want the probability that you have event A and also event B, you multiply the respective probabilities.
 one year ago

SufiyancsBest ResponseYou've already chosen the best response.0
ohh thanx it was very helpful @Jemurray3
 one year ago
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