4.2.5 - Conditional Probability
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What does P(A|B) mean in probability?
💡 Hint: 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)?
💡 Hint: How many outcomes are favorable if one blue is chosen?
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does the notation P(A|B) represent?
💡 Hint: Remember: It's about the conditional aspect.
True or False: Conditional probability can only apply to independent events.
💡 Hint: Think about how events relate to each other.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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)?
💡 Hint: 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?
💡 Hint: Review Bayes’ theorem steps to reinforce your understanding.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.