Probabilities Logical Problem

Hi, i would like to leave you here a logical problem related with probabilities, if you can help me i would appreciate a lot!.

The problem:

You have a box with 6 glasses (A,B,C,D,E,F), and you are asked to try to pick, lets say the glass B, and you have 3 chances of picking the right glass(you can pick a glass 3 times), without returning the glasses to the Box (that are the rules, and are stated before anything).

My question is: Does make any diference, i mean probabilistically, if i just pick 3 glasses from the box or if i pick the glasses 1 by 1, i mean picking one, and if i loose, i pick another, then another???

Thats my question, from my point of view i would say its make no difference, since its stated from the beginning that you are able to pick a glass 3 times.

Would be different if i am able to pick only 1 glass, fail to pick the right glass, and THEN it is offered to me another chance to pick a glass, right??

Thx in advance!! hope you can read this and answer me http://www.talkstats.com/images/smilies/smile.png

PD: Sry for my poor english, its not my lative languaje http://www.talkstats.com/images/smilies/frown.png