A baking club wants to form an executive committee. There are $20$ people in the baking club, including Mark. In how many ways can the baking club form an executive committee with $7$ people, including Mark?
We should first note that, because Mark must be on the committee, there are 19 people remaining to choose from. Also, because Mark must be on the committee, so there are 6 spots remaining.
+2115 
