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Mathematics 3 Online
OpenStudy (anonymous):

Which of the following expressions would give the number of ways to choose a group of 7 from a group of 15? a.7!/15!7 b.7!/15!8! c. 15!/7!8!

hartnn (hartnn):

its 15C7 which is 15!/7!8!

OpenStudy (anonymous):

is it because 7+8=15?

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