At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
What's the probability that the ball you remove is red if you added a red ball from bag A?
am i right? @Jemurray3
Yes, that's right. What's the probability that the ball you remove is red if you added a blue ball from bag A?
Lastly, what's the probability that you picked a red marble from bag A? Or a blue one?
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
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.
yea i know that but the part i didnt understand is why are we multiplying 1/2 with each possibility
Because that's the probability of choosing a red or blue marble from bag A to begin with.
ok its is but why multiplying
@cwrw238 read and just answer my last comment plz
@jim_thompson5910 read and just answer my last comment plz
If you want the probability that you have event A and also event B, you multiply the respective probabilities.
ohh thanx it was very helpful @Jemurray3