Situation:

An arrangement of the letters in the word probability.

Conclusion:

Total number of letters are , then .

From the total number of letters in the word arrangement of the letters is , So .

Permutation:

When the objects are arranged so that order is important and every possible order of the objects is provided, the arrangement is called a permutation.

Therefore, the situation is Permutation because arrangement of the letters in the word.

Permutation.