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Question

Solve by the method of your choice. Two teachers have driven to school in separate cars. When they arrive, there are seven empty spaces in the parking lot. They each choose a parking space. How many outcomes are possible?

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Answered 2 years ago
Answered 2 years ago
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In order to solve this equation, we need to use the formula for the number of combinations, nCr_nC_r of nn things taken rr at a time.

nCr=n!(nr)!r!_nC_r=\dfrac{n!}{(n-r)!r!}

Based on the problem, we have n=7n=7 which represents the number of empty parking spaces, and r=2r=2 which represents the number of spaces they are occupying.

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