After a business trip to London, Michele has enough time to visit three European cities before returning home. If she has narrowed her list to six cities that she'd like to visit - Paris, Barcelona, Rome, Munich, Oslo, and Stockholm - but does not want to visit both Oslo and Stockholm on the same trip, how many different sequences of three cities does she have to choose from? Choices.
A) 36	B) 48	C) 72	D) 96	E) 120
Sequence of cities she can visit without any restrictions= 6*5*4= 
<gadget id="calculator">6*5*4</gadget>
<output>120</output>
120   Sequence of cities she can visit if she visits both Oslo and Stockholm on the same trip= 3*2 *1 *4 (after choosing Oslo and Stockholm, she is left with 4 cities to choose from)= 24   Sequence of cities to choose with restrictions= 120-24= 
<gadget id="calculator">120-24</gadget>
<output>96</output>
96   96 is the answer
<result>D</result>
After a business trip to London, Michele has enough time to visit three European cities before returning home. If she has narrowed her list to six cities that she'd like to visit - Paris, Barcelona, Rome, Munich, Oslo, and Stockholm - but does not want to visit both Oslo and Stockholm on the same trip, how many different sequences of three cities does she have to choose from?