6 Find the number of ways all 9 letters of the word EVERGREEN can be arranged if
- there are no restrictions,
- the first letter is R and the last letter is G ,
- the Es are all together.
Three letters from the 9 letters of the word EVERGREEN are selected.
- Find the number of selections which contain no Es and exactly 1 R .
- Find the number of selections which contain no Es.