Four-digit code letters

A four-digit code has the letters A, B, and C in the first two places and numbers 1, 2, 3, and 4 in the following two places. How many different codes can be made if we can repeat both letters and numbers in the code?

Final Answer:

n =  144

Step-by-step explanation:

n=3 3 4 4=144



Help us improve the example. If you find a mistake, let us know. Thank you!







Tips for related online calculators
Would you like to compute the count of combinations?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: