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Mathematics 57 Online
OpenStudy (ellamoyseyuk):

1. A student government has 5 positions to fill and there are 9 candidates running for any one of the positions. How many different possibilities are there for the 5 positions? the answer choices : A. 10 B. 115 C. 1,250 D. 15,120

OpenStudy (holsteremission):

Assuming the five positions are unique in their duties and responsibilities (i.e. order matters): position 1 has 9 candidates to choose from, position 2 has 8, position 3 has 7, and so on. Otherwise, if you're talking about 5 distinct but duplicate positions - meaning their responsibilities are the same but 5 people are required to carry them out - you need to divide the previous total number of possibilities by the number of ways those possibilities could have been reordered.

OpenStudy (ellamoyseyuk):

@agent0smith can u help me ?

OpenStudy (agent0smith):

Guy above already has...

OpenStudy (agent0smith):

No... "Assuming the five positions are unique in their duties and responsibilities (i.e. order matters): position 1 has 9 candidates to choose from, position 2 has 8, position 3 has 7, and so on." use that.

OpenStudy (ellamoyseyuk):

4 has 6, 5 has 8

OpenStudy (ellamoyseyuk):

i think the answer is d is that correct?

OpenStudy (agent0smith):

I didn't check. Just multiply the number of people that could go in each position.

OpenStudy (ellamoyseyuk):

P(9, 5) = 9!/(9 - 5)! = 15120

OpenStudy (agent0smith):

Yes

OpenStudy (ellamoyseyuk):

ok thanks

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