Reimian Empire

How is that? And could you provide a link to an article on probability theory that explains this?

Hmm. Let's say you have a basket containing 1 black ball and 19 white balls.
You randomly draw one of them. If you don't draw the black ball, you put it back, shake the basket, and try again. If you do draw the black ball, you stop trying.
What is the probability that you will find the black ball within N attempts?

For reference: 0.95 raised to the power of 100 is 0.006. That is, after reading a book 100 times, you will survive with a probability of 0.6%.