How many different ways can 2 students be seated in a row of 8 desks, so that there is always at least one empty desk between the students?	Pick one.
A) 50	B) 42	C) 24	D) 20	E) 12
21 ways to seat the students:   with two empty seats between   1 empty w/ one student on the left most   1 empty....right most   two students can be interchanged   21x2=42   42
<result>B</result>
How many different ways can 2 students be seated in a row of 8 desks, so that there is always at least one empty desk between the students?