There is a rumor that daddy warbucks is starting a new airline. he plans to serve six cities: san francisco, los angeles, dallas, chicago, new york, and miami. there will be direct flights between each pair of cities. how many different routes will this create?

 15

Step-by-step explanation:

The number of combinations of n things where r things taken at a time is given by :-

Given : Total number of places (San Francisco, Los Angeles, Dallas, Chicago, New York, and Miami.)= 6

Then , the number of possible pairs of any two city will be :-

Hence, the number of different routes will this create = 15

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