Question

We have 3 doors. Only behind one door, have is a pack of golds. Your arm is to find the door with golds. Game is playing in two parts. In the part first, you will select a door out of these 3 doors. In the second part, someone will open the empty one out of these two unselected doors. Would you change your selection (selecting the unopened door from these two unrelated doors from the first part) or remain the door you have select in the first part? Why?

Answer 1

Dear your question is not so clear, but don't worry I will help you in your studies.

3 doors are there and from that we have a door with golds behind it. Our aim is find that door.

Part 1

We selected a door.

Part 2

Someone selected an empty door

Now it is sure that either we selected on part 1 or not selected by anybody contains gold. So the probability is 0.5

There is equal chance for stick in part 1 or to change the selection.

You could make any decisions since probability is 0.5