Tell me more ×
Cross Validated is a question and answer site for statisticians, data analysts, data miners and data visualization experts. It's 100% free, no registration required.
up vote 1 down vote favorite

Let's pretend there are 10 doors in front of me. Behind one of them, there is a treasure and nothing behind all the others. Intuitively, I can easily determine I have 1 chance out of 10 the pick open the right door (the one with the treasure). I repeat this 5 times (i.e. all door closed, open one door). What are my chance to find the treasure the five times?

In brief, I am wondering how to determine the probably that I find the threasure 5 times in row.

Thansk

share|improve this question
As @Edward pointed out, please add some details. – mbq♦ Sep 13 '10 at 12:40

1 Answer

up vote 3 down vote

Is the location of the treasure changed after each attempt? Wouldn't it be $(10\%)^5$?

share|improve this answer
The location changes after each attempt – Martin Sep 13 '10 at 17:47
as @Edward said. I could ask such a thing in a homework actually... Now Martin, can you figure out what's the chance you never find that treasure? – Joris Meys Sep 13 '10 at 19:47

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.