Probability · Question 16 · Easy
A number is chosen at random from 1 to 30. What is the probability that it is a prime number?
- 2/5
- 11/30
- 1/3
- 3/10
Answer and explanation
Answer: C. 1/3
Explanation: The primes up to 30 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 — 10 numbers. Probability = 10/30 = 1/3.
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