Calculate 5! .

a.
5

b.
120

c.
51

d.
60

5x4x3x2x1 = 20 x 3 60x2 120x1 = 120 Answer is B 120

The answer is:
B. 120
5! Means 5 factorials >> 5 x 4 x 3 x 2 x 1 It's simply just the product of a series of descending natural numbers (no negative numbers or fractions) which are indicated by an exclamation point.
The answer is B. because 5x4= 20, 20x3 (next number to multiply in the series) =60, 60x2= 120, 120x1= 120. 
I hope that helped (:

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