john asked:


1. How many ways can 10 different chairs be arranged in a circle?

2. Find the number of ways that 7 people can be seated at a circular table if 1 seat has a microphone in front of it

3. Consider a class with 10 sophomores, 8 juniors, and 6 seniors. Two students are selected at random. What is the probability of selecting 1 junior and 1 senior?

Maurice