If the second and third ones wear 2G, then the first one must be B. but the first person says NO, so the second and the third could be 1B1G/1G1B/2B.

Next, for the second one, if he saw the third one with G hat, then the second one must be B. But the second one says NO, so the third one must be B.

The answer is option (D): The third one wears a Blue hat.

Credit:

Each person can see others hats,

When person 1 and 2 canâ€™t guess the color of hat ,

it means they see two blue or green and blue so the third hat on blindâ€™s head could be blue 33% or green 66%

(B/B/G or B) (G/B/ G or B)

I think this question is wrong

@amin_raei98

Hey Amin!

There is nothing wrong with it.

We have 3 blue and 2 green hats.

Each person can see the two otherâ€™s hats except the blind one.

When each of these individuals see a blue hat wearing by the two others they canâ€™t guess their own hatâ€™s colour.

Your sentences are true

imagine 2 situation

First:

- Blue 2.green 3.blue

Second:

1.blue 2. Blue 3. Green

In both 1 and 2 say no so I think the answer isnâ€™t D or B

If I tell wrong correct my sentences

@AriHoresh

In both situation that I told you imagine person 1 and 2 say no (canâ€™t guess the color of hat)