Probability of two draws without replacement
The first marble is not put back, so the second draw has fewer marbles. Multiply the two probabilities.
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 has 6 red and 3 blue marbles. Two marbles are drawn one after the other and the first is NOT put back. What is the probability that both are red? Write a fraction in lowest terms.
Answer: 5/12
A bag has 8 red and 3 blue marbles. Two marbles are drawn one after the other and the first is NOT put back. What is the probability that both are red? Write a fraction in lowest terms.
Answer: 28/55
A bag has 7 red and 5 blue marbles. Two marbles are drawn one after the other and the first is NOT put back. What is the probability that both are red? Write a fraction in lowest terms.
Answer: 7/22
Tip: The first marble is not put back, so the second draw has fewer marbles. Multiply the two probabilities.
Print a worksheet of this skill New questions and an answer key, free.
Print a free worksheet with answers (20 questions).
Learn it hands-on
- Is It Fair? Chance and Probability Grades 6–7 · printable lessons
Practice without limits
Members practice as much as they like, every day, and get the printable packs and lessons too.