Probability of choosing a prime number between 1 and 20?
Probability of choosing a prime number between 1 and 20?
Approach: Count primes: 2, 3, 5, 7, 11, 13, 17, 19.
2/5. 8 / 20 = 2/5.
Follow-up: Is 1 a prime number?
Key concepts: primes.
Probability of choosing a prime number between 1 and 20?
Approach: Count primes: 2, 3, 5, 7, 11, 13, 17, 19.
2/5. 8 / 20 = 2/5.
Follow-up: Is 1 a prime number?
Key concepts: primes.