Riddle help? logical sense? best answer?

Question

The scene:

three men are facing a wall and in line.

? ? !

1 2 3

o- o- o-

facing ---> that way

A hat is placed on each guy, while their eyes are closed.

Hats are slected from a barrel that originally contained

3 white hats

2 black hats

The man 1 at the back sees the two people in front of him

and SAYS HE DOESNT KNOw WHAT COLOR HE IS WEARING

The man 2 in the middle, who sees only the hat of the man 3 says he doesnt know what color he is wearing

Finally the man in the front, who cant see no hats says

HE KNOWS WHAT COLOR HE"S WEARING

what color ?

How does he know?

thank you for taking the time to read this and answering it with good answers :)

Answer 1

the man's hat is white.

the first man looks forward and says he does not know, which means the two hats in front of him must either be both white, or one white and one black.  if they were both black he would know his was white.

the second man looks forward and says he does not know, which means that the hat in front of him cannot be black.  he knows the same as the first man; if he looked forward and saw a black hat he would know his was white, but when he looks forward and sees a white hat he knows his hat could either be black or white.

the third man, therefore, knows that his hat must be white.