5 x 4 x 3 x 2 x 1 = 5 ! = 120
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5x4x3x2x1=120
120 5x4x3x2x1=120
example: 5 factorial notation is 5x4x3x2x1= ______that's factorial notationIt is written as 5!
25 and over ----------------------------------------------------------------------------------------------- The number of ways is 5x4x3x2x1= 120 ways
The exclamation point is called a factorial. ex. 5!=5x4x3x2x1 10!=10x9x8x7x6x5x4x3x2x1 etc.