SOLUTION: An ID at the zoo consists of 2 letters followed by 2 number (0-9). How many unique IDs are possible?

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Question 1164300: An ID at the zoo consists of 2 letters followed by 2 number (0-9). How many unique IDs are possible?

Answer by ikleyn(52780)   (Show Source): You can put this solution on YOUR website!
.

Any one of 26 letters of the English alphabet is in the first position;

any one of 26 letters of the English alphabet is in the second position;

any one of 10 digits is in the third position, and

any one of 10 digits is in the fourth position.


All these choices are independent, giving 26*26*10*10 = 67600  different possible IDs.    ANSWER

Solved.

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The referred lesson is the part of this online textbook under the topic  "Combinatorics: Combinations and permutations".


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