Answer:
It's B 840
Step-by-step explanation:
N!
_____
(n-r)!
7!
___
(7-4)!
7×6×5×4×3×2×1
_____________
3×2×1
7×6×5×4
840
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Answers & Comments
Answer:
It's B 840
Step-by-step explanation:
N!
_____
(n-r)!
7!
___
(7-4)!
7×6×5×4×3×2×1
_____________
3×2×1
7×6×5×4
840