6. Data Analysis
Probability Basics — Quiz
Test your understanding of probability basics with 5 practice questions.
Practice Questions
Question 1
A bag contains 5 red, 4 blue, and 3 green marbles. If two marbles are drawn without replacement, what is the probability that the first marble is red and the second marble is blue?
Question 2
In a group of 20 students, 10 play piano, 8 play guitar, and 3 play both. What is the probability that a randomly selected student plays neither piano nor guitar?
Question 3
A fair six-sided die is rolled twice. What is the probability of rolling an odd number on the first roll and an even number on the second roll?
Question 4
A spinner has sections labeled A, B, C, and D. The probability of landing on A is 0.2, on B is 0.3, and on C is 0.4. What is the probability of landing on D?
Question 5
A deck of 52 cards is shuffled. What is the probability of drawing a card that is either a King or a Spade?