Online Test — Probability
10 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 10
What is the theoretical probability of rolling a 3 on a fair die?
1/3
1/6
1/2
1/4
Explanation: A die has 6 equally likely outcomes; 3 appears once
Question 2 of 10
A coin is flipped 50 times and shows heads 28 times. Experimental probability of heads is:
0.5
0.56
0.44
0.28
Explanation: 28/50 = 0.56
Question 3 of 10
The probability of an impossible event is:
1
0.5
0
-1
Explanation: Impossible events never happen, probability = 0
Question 4 of 10
A bag has 6 red and 4 blue marbles. P(red) is:
0.4
0.5
0.6
0.7
Explanation: 6 red out of 10 total = 6/10 = 0.6
Question 5 of 10
Which event has probability 1?
Rolling a 7
Getting heads
Sun rising tomorrow
Winning lottery
Explanation: Certain event = probability 1
Question 6 of 10
If P(rain) = 0.3, P(no rain) = ?
0.3
0.7
0.03
0.97
Explanation: Complement rule: 1 - 0.3 = 0.7
Question 7 of 10
A spinner has 5 equal sections. P(spinning any specific number) = ?
1/2
1/5
1/4
1/3
Explanation: 1 favorable out of 5 possible = 1/5
Question 8 of 10
In 300 rolls of a die, how many times would you predict rolling a 4?
50
60
75
100
Explanation: (1/6) × 300 = 50
Question 9 of 10
A fair game has P(win) = ?
1
0.5
0
Depends
Explanation: Fair = equal chance for both players = 0.5
Question 10 of 10
A bag has 3 green, 5 yellow, 2 blue balls. P(green or blue) = ?
0.5
0.3
0.4
0.6
Explanation: Green+blue = 5 out of 10 = 5/10 = 0.5