Free ACT Statistics and Probability practice questionsEnhanced ACT, 2026 format
Mean, median, and mode; probability of simple and compound events; counting arrangements; and reading values and trends off tables and graphs.
Answer each question, then read why the right answer is right and why the tempting one is wrong.
Question 1
A data set consists of the seven values 4, 7, 7, 9, 12, 15, and 18. If the value 18 is replaced with 60, which of the following statements is true?
Question 2
A spinner has 8 equal sectors numbered 1 through 8. If the spinner is spun once, what is the probability that it lands on a number that is prime or greater than 6?
Question 3
A spinner has 8 equal sections numbered 1 through 8. What is the probability that a single spin lands on a number that is either even or greater than 5?
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