SOLUTION: Serial numbers for a product are to be made using 3 letters followed by 4 numbers. If the letters are to be taken from the first 7 letters of the alphabet with no repeats possible,
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Question 1109808: Serial numbers for a product are to be made using 3 letters followed by 4 numbers. If the letters are to be taken from the first 7 letters of the alphabet with no repeats possible, how many serial numbers can be generated? Answer by greenestamps(13209) (Show Source):
7 choices for the first letter
6 choices for the second
5 choices for the third
10 choices for each of the four digits (assuming the "no repeats" rule applies only to the letters)
Use the fundamental counting principle: multiply all the numbers of choices together.
