Probability
8 questions · EasyMediumHard
Probability = favourable outcomes ÷ total outcomes, always between 0 and 1. List the sample space carefully before you count.
💡 Quick tricks
- A die has 6 equal outcomes; a coin has 2.
- P(not A) = 1 − P(A), which is often quicker than counting directly.
- Even numbers on a die are 2, 4 and 6, so the probability is 3/6 = 1/2.
🎯 Try it yourself
Tap an answer. You'll see if it's right, and why. Easy ones come first.
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Q1Easy
A die is rolled. Probability of getting a multiple of 3?
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Answer: D. 1/3
💡 2 of the 6 faces qualify, so the probability is 2/6 = 1/3.
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Q2Easy
A die is rolled. Probability of getting a prime number?
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Answer: B. 1/2
💡 3 of the 6 faces qualify, so the probability is 3/6 = 1/2.
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Q3Easy
A die is rolled. Probability of getting a number greater than 4?
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Answer: D. 1/3
💡 2 of the 6 faces qualify, so the probability is 2/6 = 1/3.
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Q4Medium
Two dice are thrown. Probability of a sum of 4?
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Answer: B. 1/12
💡 3 of the 36 equally likely outcomes give a sum of 4, so the probability is 3/36 = 1/12.
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Q5Medium
Two dice are thrown. Probability of a sum of at least 5?
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Answer: B. 5/6
💡 30 of the 36 equally likely outcomes give a sum of at least 5, so the probability is 30/36 = 5/6.
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Q6Medium
Two dice are thrown. Probability of a sum of at least 6?
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Answer: A. 13/18
💡 26 of the 36 equally likely outcomes give a sum of at least 6, so the probability is 26/36 = 13/18.
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Q7Hard
A bag has 6 red, 6 blue and 4 green balls. One is drawn. Probability it is red?
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Answer: C. 3/8
💡 6 of the 16 balls are red, so the probability is 6/16 = 3/8.
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Q8Hard
A bag has 6 red, 5 blue and 2 green balls. One is drawn. Probability it is blue?
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Answer: C. 5/13
💡 5 of the 13 balls are blue, so the probability is 5/13.
Your score
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