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anonymous
 one year ago
So which notation do I use?
Which of the following is the appropriate notation when calculating conditional probabilities?
anonymous
 one year ago
So which notation do I use? Which of the following is the appropriate notation when calculating conditional probabilities?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And is 'union' interchangeable with 'and'?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1no, since "union" is interchangeable with "or"

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So that would be the upside union sign then?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1"intersection" is interchangeable, with "and", and its symbol is the upside union symbol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay, so then can I eliminate option B as a possible answer?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sweet! And also A as it has a union sign or no?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1in order to compute the conditional probability, we can eliminate the first two options

phi
 one year ago
Best ResponseYou've already chosen the best response.0To answer this one, you need to know the definition of conditional probability some of the choices are correct, but not related to conditional probability

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh, the answer is C Because it needs to be over P(A) not P(B) which in this case is C and D, respectively.

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1I think that C is not the answer since the conditional probability involves the probabilities of 2 correlated or uncorrelated distinct events

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh, you're right. It would be over P(C) if C was the second term. But it is P(C  D) not P(C  C). I get it, thank you @Michele_Laino

phi
 one year ago
Best ResponseYou've already chosen the best response.0P(C  D ) means probability of C given that D occurs it is the intersection of C and D divided by the chance of D occuring

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1the definition of conditional probability is: \[P\left( {C \cap D} \right) = P\left( D \right)P\left( {CD} \right)\] namely the probability for intersection, is equal to the probability of the first event D times the probability of the other event C, when D is occurred
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