The number of six letter words that can be formed using the letters of the word ASSIST in which Ss alternate with other letters is `12` b. `24` c. `18` d. none of these

Explanation

To solve the problem of forming six-letter words using the letters of the word "ASSIST" such that the letters 'S' alternate with other letters, we can follow these steps:

### Step 1: Identify the letters and their arrangement
The word "ASSIST" consists of the letters A, S, S, I, S, T. We have:
- 3 S's
- 1 A
- 1 I
- 1 T
...