A fair six-sided die is rolled once. What is the probability of a prime number?
Answer and explanation
Correct answer: C. 1/2
- Step 1: List the prime numbers from 1 to 6: 2, 3 and 5. Step 2. Probability = 3 / 6 = 1/2. Answer: 1/2. Why not the others: 1/3 leaves out 5; 2/3 counts 1, which is not prime; 5/6 counts 4 and 6, which are not prime.
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