Construct and interpret two-way frequency tables of data when two categories are associated with each object being classified. Use the two-way table as a sample space to decide if events are independent and to approximate conditional probabilities. For example, collect data from a random sample of students in your school on their favorite subject among math, science, and English. Estimate the probability that a randomly selected student from your school will favor science given that the student is in tenth grade. Do the same for other subjects and compare the results.

Example Problems
Two fair 6-sided dice are rolled. What is the probability that both show a prime number?
Write your answer as a
fraction.
A fair coin is flipped three times. What is the probability of getting exactly two heads?
Write your answer as a
fraction.
If you flip two fair coins, what is the probability that you get at least one head?
Write your answer as a
fraction.
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