25. Ten seniors are qualified to become the president
and vice-president in a club. Find the number of
ways they can occupy the two positions.
A 3 628 800
C. 180
B 362 880
D. 90
and vice-president in a club. Find the number of
ways they can occupy the two positions.
A 3 628 800
C. 180
B 362 880
D. 90
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go to my houe
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