Question

how many different words (meaningful or meaningless) can be formed by arranging the letters of the words EXAMOFOBIA taken all at a time ? if these words are written in dictionary then which word will be EXAMOFOBIA​

Answer 1

Answer:

$\frac{n(n - 2)}{2} \\ n = 10 \\ \frac{10(10 - 2)}{2} \\ \frac{10(8)}{2} \\ 40$