6. Advanced Topics

Probability — Quiz

Test your understanding of probability with 5 practice questions.

Practice Questions

Question 1

A jar contains 6 red balls, 4 green balls, and 5 blue balls. If one ball is drawn at random, what is the probability that it is either red or green?

Question 2

In how many ways can 5 students be seated in a circle?

Question 3

A fair six-sided die is rolled three times. What is the probability that the first roll is a 2 and the next two rolls are both odd numbers?

Question 4

How many different 3-letter arrangements can be formed from the letters in the word 'SCHOOL' if repetition is not allowed?

Question 5

A bag contains 7 red balls, 3 green balls, and 4 blue balls. If two balls are drawn at random without replacement, what is the probability that both are red?