Suppose you have a round table with a radius of 20 inches. There's a bottle on the table, but you don't know exactly on which spot. However, you know that the bottle has an equal probability of being on any spot on the table.
You can only reach 10 inches in with your hand such that you stop right on the edge of the smaller circle, like this:
If you wear a blindfold and encircle the table while reaching for the bottle, what is the probability that it will be within your reach?
You can only reach 10 inches in with your hand such that you stop right on the edge of the smaller circle, like this:
If you wear a blindfold and encircle the table while reaching for the bottle, what is the probability that it will be within your reach?