A number is selected at random between 20 and 30, both numbers inclusive. Find the probability that the number is a prime.
Answer Details
Probability is the measure of how likely an event is to occur. In this question, we want to find the probability of selecting a prime number between 20 and 30, both numbers inclusive.
The prime numbers between 20 and 30 are 23 and 29.
The total number of possible outcomes (or numbers between 20 and 30) is 11 (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30).
So, the probability of selecting a prime number is the number of favorable outcomes (prime numbers) divided by the total number of possible outcomes.
The probability of selecting a prime number is 2/11.
So, the answer is 2/11.