What is the probability that a randomly chosen natural number from 10 to 19 by three?

1. First, let’s determine how many numbers there are from 10 to 19. These are 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 – that is, the total number is 10 numbers.

2. Now let’s determine which of the ten available numbers are divisible by 3, these are 12, 15 and 18. That is, only 3 of the available numbers satisfy the condition.

3. And now we find out what is the probability that the number chosen at random is divisible by 3, we get:

P = 3/10 = 0.3.

Answer: The probability that the number chosen at random is divisible by 3 is 0.3.