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An executive committee of three is selected from a group of ten. Which expression best describes the number of combinations?

These are my choices. I have to have one of these as the answer. I am stuck.

My answer was B. 10!, but I am still not sure. Can anyone help me please?

A. 10P3 (small 10 and 3)
B. 10!
C. 3P10 (small 3 and 10)
D. 10P3/3! (small 10 and 3 on top, big 3! on the bottom)

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