There are 20 balls in the urn with numbers from 1 to 20. What is the probability of taking

There are 20 balls in the urn with numbers from 1 to 20. What is the probability of taking out the ball with number 37? with number 5?

a) In total, there are 20 balls in the urn with numbers from 1 to 20. So we cannot pull out the ball with the number 37 from the urn, since there is simply no such thing (maximum number 20). This event is impossible, which means its probability is 0.
b) Only one ball with number 5 can be drawn out of 20 balls. So the probability of this event is 1/20 (5%).
Answer: a) P = 0 b) P = 1/20 (5%)