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4 cards from this section. Quick, good the night before a test.
What does P(A|B) mean in probability?
Think about how events can be dependent on previous occurrences.
In a bag of marbles, if 6 are red and 4 are blue, what is P(Red | Blue selected)?
How many outcomes are favorable if one blue is chosen?
What does the notation P(A|B) represent?
Remember: It's about the conditional aspect.
True or False: Conditional probability can only apply to independent events.
Think about how events relate to each other.
A box contains 3 red and 2 green balls. If you draw one ball, replace it, then draw another. What’s P(red on second draw | green on first draw)?
Write out probabilities clearly and remember the independence after replacement.
A 90% accurate test for a disease is given to a population where 2% have the disease. What’s the chance of having it if you test positive?
Review Bayes’ theorem steps to reinforce your understanding.
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