1. The missing question here is : "what is the probability that the mail sorter placed each letter correctly"?
2. Name the letters L1, L2, ....L8 (Letter 1, Letter 2.... Letter 8)
3. The first letter has a probability of 1/25 to be placed in the correct mailbox.
Each of the remaining 7 letters have 1/25 probability, and these probabilities are related.
4. So the probability that each letter goes to the proper mailbox is
2. Name the letters L1, L2, ....L8 (Letter 1, Letter 2.... Letter 8)
3. The first letter has a probability of 1/25 to be placed in the correct mailbox.
Each of the remaining 7 letters have 1/25 probability, and these probabilities are related.
4. So the probability that each letter goes to the proper mailbox is
