How many different arrangements can be made with the letters in the word ROBERT if you use all of the letters?
k 6 characters in the name robert
overall, there should be 36 possible unique arrangements for the letters ROBERT
Since there are 6 different letters, you have 6 choices for the first letter.
Now, since there are 5 letters remaining, you have 5 choices for the second letter.
Then, you have 4 choices for the third letter; 3 choices for the fourth letter; 2 choices for the fifth leetter; and only 1 choice for the sixth, and last letter.
Multiplying these choices together: 6 x 5 x 4 x 3 x 2 x 1 = 6! = 720 choices.