Find probabilities of compound events
Write the favorable count over the total, in lowest terms.
Loading a question…
You've done today's 10 free questions.
Come back tomorrow for 10 more, or get unlimited practice with a membership.
Want more today? Print 20 more questions free, with the answers.
Already a member? Sign in.
See worked examples
A bag holds 2 red, 6 blue and 5 green marbles. What is the probability that a marble drawn at random is not red? Write a fraction in lowest terms.
Answer: 11/13
A bag holds 1 red, 6 blue and 2 green marbles. What is the probability that a marble drawn at random is not red? Write a fraction in lowest terms.
Answer: 8/9
A bag holds 4 red, 4 blue and 2 green marbles. What is the probability that a marble drawn at random is not red? Write a fraction in lowest terms.
Answer: 3/5
Tip: Write the favorable count over the total, in lowest terms.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Need a warm-up? Probability of a single event Grade 11
Print a free worksheet with answers (20 questions).
Practice without limits
Members practice as much as they like, every day, and get the printable packs and lessons too.