00:01
Hi, i'm david and i'm here to help you answer your question.
00:02
Now let me pick up your question here.
00:05
In the question here, we want to find how many letters can be much based on the letter wasteful.
00:13
Here if we count the number of letters, here we have 1, 2, 3, 4, 5, 6, 7, 8, and there's no ready to be a repetition here.
00:21
Now for the number 1, if we have the repetition is allowed, so therefore the number of the word, it will be, we have one, the first letter, the second, the third, the four, the fifth, the sixth, and the seventh.
00:48
Now we have, for the first letter, we have eight choices.
00:52
And because the repetition is allowed, we have also eight choices for the second one, eight choices for the third one, eight choices, eight choices, and then also eight choices...