A woman has n keys, of which one will open her door.
(a) If she tries the keys at random, discarding those that do not work, what is the probability that she will open the door on her kth try?
(b) What if she does not discard previously tried keys?
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.