(i)[2]
In how many different ways may the 9 letters of the word TELEPHONE be placed in a straight line if P and L are required to be at the ends?
(ii)[1]
How many distinct choices of 4 letters can be made from the 9 letters of the word TELEPHONE if no E is included?
(iii)[2]
How many distinct selections of 4 letters can be made from the 9 letters of the word TELEPHONE if exactly 1 E is included?
(iv)[4]
How many distinct selections of 4 letters can be made from the 9 letters of the word TELEPHONE with no extra conditions?