sentences:  You wish to choose a stopping rule which maximises your chance of picking the best object.Here, if formula_68 ("n" is some large number) are the ranks of the objects, and formula_6 is the chance you pick the best object if you stop intentionally rejecting objects at step i, then formula_70 and formula_71 are the sequences associated with this problem.This problem was solved in the early 1960s by several people.