4 Fran is working on a word puzzle and is looking for four letter scrambles from the clue word calculate a How many of the possible four letter scrambles contain four different letters b How many contain two as and one other pair of identical letters c How many scrambles consist of any two pairs of identical letters d What possibilities have you not yet taken into account Find the number of scrambles for each of these cases e What is the total number of four letter scrambles taking all cases into account