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anonymous
 one year ago
Is there another way to think through conditional probabilities without using a tree diagram?
anonymous
 one year ago
Is there another way to think through conditional probabilities without using a tree diagram?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0When you say "think through", do you mean working out a specific exercise or understanding what conditional probabilities generally mean?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0(I think I can help you in both cases!)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes working out a specific excercise !?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay there's a formula for the conditional probability, which is P(AB) = P(A and B)/P(B)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Have you seen that before?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay, cool! Would you like me to take you through a specific example to see how it works, or does that sort out your problem?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no I was just wondering if there was another way besides using that formula ? But if you want to show me an example that would be great too :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I can draw a picture, if it helps.

Hero
 one year ago
Best ResponseYou've already chosen the best response.0post the conditional probability problem you are working on and we can work through it.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1442528356799:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0P(AB) means that you know for sure that B has happened, and you want to know the chance of A happening now.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If B has already happened, then you know that you're somewhere inside the circle on the right (in my drawing). To find the probability of A also happening, you need to see how big the area marked "A and B" is compared to the whole of the circle B.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That's why you get the formula P(A and B) / P(B).

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Perfect! I think I understand it better haha. My professors sucks, but have a great day guys!

Hero
 one year ago
Best ResponseYou've already chosen the best response.0Great job of explaining things @BasketWeave
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