SOLUTION: Evaluate 20!/18!

Algebra ->  Probability-and-statistics -> SOLUTION: Evaluate 20!/18!      Log On


   

Question 74075: Evaluate 20!/18!
Answer by Edwin McCravy(20063) About Me  (Show Source):
You can put this solution on YOUR website!

20!/18! =
       
 20ｷ19ｷ18ｷ17ｷ16ｷ15ｷ14ｷ13ｷ12ｷ11ｷ10ｷ9ｷ8ｷ7ｷ6ｷ5ｷ4ｷ3ｷ2ｷ1
覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧
    18ｷ17ｷ16ｷ15ｷ14ｷ13ｷ12ｷ11ｷ10ｷ9ｷ8ｷ7ｷ6ｷ5ｷ4ｷ3ｷ2ｷ1

Have a good time canceling:

        1  1  1  1  1  1  1  1  1 1 1 1 1 1 1 1 1 1
 20ｷ19ｷ18ｷ17ｷ16ｷ15ｷ14ｷ13ｷ12ｷ11ｷ10ｷ9ｷ8ｷ7ｷ6ｷ5ｷ4ｷ3ｷ2ｷ1
覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧
````18ｷ17ｷ16ｷ15ｷ14ｷ13ｷ12ｷ11ｷ10ｷ9ｷ8ｷ7ｷ6ｷ5ｷ4ｷ3ｷ2ｷ1
     1  1  1  1  1  1  1  1  1 1 1 1 1 1 1 1 1 1


                        20ｷ19

                         380