China Naming Network - Ziwei knowledge - Eight people draw lots, of which only 1 travel volume and seven empty volumes are available. What is the probability that the second person will get a travel ticket?
Eight people draw lots, of which only 1 travel volume and seven empty volumes are available. What is the probability that the second person will get a travel ticket?
Everyone has the same probability of a tourist ticket, which is 1/8.
Now, if the assumptions are different, we can prove that the probability that the first person in the eight lottery tickets draws the travel volume is 1/8. If the first person does not draw the second person, the probability is (1-kloc-0//8) * (1/7) =1.
The front 1- 1/8 means that the first person didn't draw the back 1/7 means to choose one from the remaining seven people.
Let's calculate the third person's (1-1/8) * (1-kloc-0//7) * (1/6) =1/8.
The first two items mean that neither of them has drawn the third item.
Conversely, it can be proved that their probability is the same. That's fair.