to create an entry code for a push-button door lock you need to first choose a letter and then, three single-digit numbers. how many entry codes can you create?

Question

to create an entry code for a push-button door lock, you need to first choose a letter and then, three single-digit numbers. how many entry codes can you create?

Answer 1

You have 26 choices (all letters of the English alphabet) for the first slot, 10 choices (all digits from 0 to 9) for the second slot, 10 choices for the third slot, and 10 choices for the fourth slot.

In order to calculate the total number of unique codes you can create, simply multiply the number of choices for each of the 4 slots.

This will give you 26 x 10 x 10 x 10 = 26 x 1000 = 26,000 codes.