6.2 - Discrete Random Variables
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Practice Questions
Test your understanding with targeted questions
What is a discrete random variable? Provide an example.
💡 Hint: Think about outcomes of simple experiments.
What does PMF stand for?
💡 Hint: It's related to how we calculate probabilities for discrete variables.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does a discrete random variable represent?
💡 Hint: Consider how many different outcomes can be listed.
True or False: The PMF can take on negative probabilities.
💡 Hint: Recall the basic properties of probability.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A game involves rolling a fair cube three times. What is the probability of getting exactly two sixes?
💡 Hint: Identify n, k, and p to use the binomial formula correctly.
Given a random variable X with the following PMF: P(X=0) = 0.3, P(X=1) = 0.4, P(X=2) = 0.3. Calculate the variance.
💡 Hint: You will need to find E[X²] first; sum the square of x times their respective probabilities.
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