There are eight different models that are to appear in a fashion show. Two are from Europe, two are from South America, and two are from North America. If all the models from the same continent are to stand next to each other, how many ways can the fashion show organizer arrange the models? Choose the correct choice: A) 72 B) 48 C) 284 D) 24 E) 8
Since we have 3 continental pairs (EU, SA, NA), these 4 pairs have 4*3*2*1= 
<gadget id="calculator">4*3*2*1</gadget>
<output>24</output>
24 Combinations. Within each pair, you have however 2 different ways to put them together for each of the pair (2*2*2*2= 16). So we have 24*16 = 284.   Please correct me if im wrong.   Answer 284.
<result>C</result>
There are eight different models that are to appear in a fashion show. Two are from Europe, two are from South America, and two are from North America. If all the models from the same continent are to stand next to each other, how many ways can the fashion show organizer arrange the models?