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9 votes
9 votes
Determine the value of each expression below.

(a) 7!
(b) 0!
(c) 9C4
(d) 10 C3
(e) 9P2
(f) 12 P4

User Kyle Tolle
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1 Answer

19 votes
19 votes

(a)
7!=7 \cdot 6 \cdot 5 \cdot 4 \cdot 3 \cdot 2 \cdot 1=5040

(b) 1

(c)
(9!)/(5!4!)=(9 \cdot 8 \cdot 7 \cdot 6)/(4!)=(9 \cdot 8 \cdot 7 \cdot 6)/(24)=126

(d)
(10!)/(7!3!)=(10 \cdot 9 \cdot 8)/(3!)=(10 \cdot 9 \cdot 8)/(6)=120

(e)
(9!)/(7!)=9 \cdot 8=72

(f)
(12!)/(8!)=12 \cdot 11 \cdot 10 \cdot 9=19958400

User Deblocker
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