Using all the letters of the word "PROBLEMS", how many words can be formed, which begin with P and end with S?	Select the correct option
A) 680  B) 560  C) 720  D) 120  E) 650
There are eight letters in the given word.   Consider 8 blanks ....   The first blank and last blank must be filled with P and S all the remaining six blanks can be filled with the remaining 6 letters in 6! ways.   The number of words = 6! = 720.   ANSWER:720
<result>C</result>
Using all the letters of the word "PROBLEMS", how many words can be formed, which begin with P and end with S?