Answer your choice in the comment below: There are three bags in front of you (lets say bag A, B, and C). Inside one of them there is 1000$ cash and if you select it correctly the cash is yours. I know which bag is the one with the cash inside. I will let you select one of the three (lets say you select bag B). Between the remaining two I am going to open one (Bag C) without a cash and ask you if you want to switch to the other bag (Bag A). Should you switch to A or stick with your first choice. What is the probability of you winning the money according to your decision