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Finite Math Examples
C15
Step 1
Evaluate C15 using the formula Crn=n!(n-r)!r!.
5!(5-1)!1!
Step 2
Subtract 1 from 5.
5!(4)!1!
Step 3
Step 3.1
Rewrite 5! as 5⋅4!.
5⋅4!(4)!1!
Step 3.2
Cancel the common factor of 4!.
Step 3.2.1
Cancel the common factor.
5⋅4!(4)!1!
Step 3.2.2
Rewrite the expression.
51!
51!
Step 3.3
Expand 1! to 1.
51
Step 3.4
Divide 5 by 1.
5
5