Final answer:
The probability of choosing a prime number from the given sequence is 1.
Step-by-step explanation:
In this case, the sequence given contains prime numbers, which are numbers that have exactly two distinct positive divisors: 1 and the number itself. From the given sequence, the prime numbers are 2, 3, 5, 7, 11, 13, 17, and 19. There are a total of 8 prime numbers in the sequence.
To find the probability of choosing a prime number, we need to divide the number of favorable outcomes (the prime numbers) by the total number of possible outcomes (the numbers in the sequence). The total number of numbers in the sequence is 8. Therefore, the probability of choosing a prime number from the sequence is 8/8, which is equal to 1.
Thus, the probability of choosing a prime number from the given sequence is 1.