Probability Practice Questions
Class 9 · Mathematics · 1084 free MCQs with instant results and detailed explanations.
1084
Total
449
Easy
502
Medium
133
Hard
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Topics in Probability
Empirical Probability
538
Experimental Probability
546
Sample Questions from Probability
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
If a coin is tossed 100 times and lands on heads 45 times, what is the experimental probability of getting heads?
A.
0.45
B.
0.55
C.
0.50
D.
0.60
Show Answer & Explanation
Correct Answer: A
The experimental probability is calculated as the number of favorable outcomes divided by the total number of trials. Here, it is 45/100 = 0.45.
Q2
Easy
A die is rolled 50 times, and the number 4 appears 10 times. What is the experimental probability of rolling a 4?
A.
0.20
B.
0.10
C.
0.25
D.
0.15
Show Answer & Explanation
Correct Answer: A
The experimental probability is 10 occurrences of 4 out of 50 rolls, which is 10/50 = 0.20.
Q3
Easy
If a spinner is divided into 4 equal sections numbered 1 to 4 and is spun 100 times resulting in the number 2 appearing 25 times, what is the experimental probability of landing on 2?
A.
0.25
B.
0.20
C.
0.15
D.
0.30
Show Answer & Explanation
Correct Answer: A
The experimental probability of landing on 2 is calculated as the number of times it appears divided by total spins: 25/100 = 0.25.
Q4
Medium
A bag contains 3 red, 5 blue, and 2 green balls. If a ball is drawn at random, what is the experimental probability of drawing a blue ball if it was drawn 25 times with 10 blue balls?
A.
0.4
B.
0.5
C.
0.3
D.
0.2
Show Answer & Explanation
Correct Answer: A
The experimental probability is found by dividing the number of blue balls drawn by total draws: 10/25 = 0.4.
Q5
Medium
In a school, a survey found that 70% of students preferred online classes during the pandemic. If 300 students are surveyed, how many preferred online classes?
A.
210
B.
240
C.
270
D.
300
Show Answer & Explanation
Correct Answer: A
70% of 300 is calculated as (70/100) * 300 = 210 students.
Q6
Medium
If a player wins 12 out of 30 games, what is the experimental probability of winning a game?
A.
0.4
B.
0.5
C.
0.3
D.
0.6
Show Answer & Explanation
Correct Answer: A
The experimental probability of winning is calculated as 12/30 = 0.4.
Q7
Medium
If a spinner is divided into 4 equal sectors numbered 1 to 4 and is spun 100 times resulting in 27 lands on 1, what is the experimental probability of landing on 1?
A.
0.27
B.
0.25
C.
0.3
D.
0.23
Show Answer & Explanation
Correct Answer: A
The experimental probability of landing on 1 is the number of times it lands on 1 divided by total spins: 27/100 = 0.27.
Q8
Hard
A bag contains 3 red balls, 2 blue balls, and 5 green balls. If one ball is drawn at random, what is the experimental probability of it being a blue ball if in 100 trials, 18 blue balls were drawn?
A.
0.18
B.
0.12
C.
0.15
D.
0.20
Show Answer & Explanation
Correct Answer: A
The experimental probability is found by dividing the number of favorable outcomes by the total trials. So, 18 blue balls in 100 trials gives a probability of 0.18.
Q9
Hard
In a class of 30 students, 18 prefer Mathematics, 12 prefer Science. If the experimental probability of choosing a Mathematics student is calculated based on random selections, what is the probability if 10 students were tested and 6 were from Mathematics?
A.
0.5
B.
0.6
C.
0.7
D.
0.4
Show Answer & Explanation
Correct Answer: B
The experimental probability of choosing a Mathematics student is calculated by the ratio of Mathematics students chosen to total students tested: 6/10 = 0.6.
Q10
Hard
A jar contains 5 red, 3 yellow, and 2 blue marbles. If you draw 10 marbles with replacement and obtain 4 red, 3 yellow, and 3 blue, what is the experimental probability of drawing a red marble?
A.
0.4
B.
0.3
C.
0.5
D.
0.2
Show Answer & Explanation
Correct Answer: A
The experimental probability is given by the ratio of the number of red marbles drawn to the total number of draws: 4/10 = 0.4.
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Probability — Class 9 Mathematics Practice Questions Online
This page contains 1084 practice MCQs for the chapter Probability in Class 9 Mathematics. The questions are organized by difficulty — 449 easy, 502 medium, 133 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 2 topics, giving you comprehensive coverage of the entire chapter.