Question

Solve the following 20!/17!

Answer 1

`20!/17!`

`(20!)/(17!)=20\cdot \:19\cdot \:18`

`20\cdot \:19\cdot \:18=6840`

`OAmalOHopeO`

Answer 2

6840

Explanation:

20 ! = 20*19*18*17*.......1

17 =17*16*15*.....1

20!

-----

17!

20*19*18*17*.......1

---------------------------

17*16*15*.....1

Canceling like terms

20*19*18

------------

1

6840