A bag holds 9 red counters and 1 blue counter, and one counter is taken at random. Which word describes taking the blue counter, and what is its probability as a fraction out of the total number of counters?

توضیح

One counter in ten is blue, so blue is drawn once in every ten draws on average, a value near the bottom of the scale without reaching it. Calling the draw impossible would mean the bag contained no blue counter at all, whereas one blue counter among nine red ones makes the draw rare rather than out of the question.