Four people are to be seated on a bench. How many different sitting arrangements are possible if Erik must sit next to Joe?
Pick one
A) 4	B) 6	C) 8	D) 12	E) 16
Consider E and J one. But, in this arrangement they can sit in two different combinations.   E first and J second or J first and E second.   Total we have (E and J) and the two other persons= 4 arrangements to do.   Total arrangements= 4*2= 
<gadget id="calculator">4*2</gadget>
<output>8</output>
8   8 is the answer
<result>C</result>
Four people are to be seated on a bench. How many different sitting arrangements are possible if Erik must sit next to Joe?