MathProblem-Solving & Data Analysis
Practice
Probability Practice
Original questions involving dependent and conditional probabilities.
Question progress1 of 2
- Answered
- 0 / 2
- Correct
- 0
- Incorrect
- 0
- Accuracy
- 0%
Session completion0%
Review mode: answers and explanations remain visible.
Question 1 of 2
Question 1
Medium
Correct answer\(\frac{3}{10}\)
Explanation
The first-red probability is \(3/5\); then \(2\) red tiles remain among \(4\) total. Thus \((3/5)(2/4)=3/10\).
Question 2 of 2
Question 2
Hard
Correct answer\(\frac{5}{8}\)
Explanation
The condition restricts the sample space to Grade 12: \(12+20=32\) students. Of those, \(20\) take Music, so the probability is \(20/32=5/8\).
Keyboard: use Tab to move, arrow keys to change answer choices, and Enter to check an answer.
Your practice summary
Use the results to decide what to review before your next attempt.
Score0 / 20% accuracy
- Correct
- 0
- Incorrect
- 0
- Completed
- 2 / 2
Questions to review
No mistakes this time. Excellent work.
- Question 1Calculate dependent probabilityMedium
- Question 2Calculate conditional probability from a tableHard