Chances of success for n times 1/n?

It’s a 1/n chance and I did it n times, so the odds should be… 63%. Almost always.

Have you ever wondered about the odds of success when trying something with a 10% success probability 10 times? Well, I guess if you seriously thought about it and spent time doing the maths, I have no news for you. But otherwise, check out “It’s a 10% chance which I did 10 times, so it should be 100%”.

And remember, don’t confuse the expected value (10 times 10% should be a total of 1, right?) with the probability of succeeding at least once (about 63%, always)!