Answer: We have 5000 possible combinations.
Step-by-step explanation:
I guess that we want to find the possible combinations for this lock.
We have 4 numbers, so we have 4 selections.
Now, let's count the number of options in each selection.
in the first selection, we have 10 options (0, 1, 2, 3, 4, 5, 6, 7, 8 and 9)
in the second selection, we have 10 options (0, 1, 2, 3, 4, 5, 6, 7, 8 and 9)
in the third selection, we have 10 options (0, 1, 2, 3, 4, 5, 6, 7, 8 and 9)
in the last selection, we have 5 options (0, 2, 4, 6 and 8)
The total number of combinations is equal to the product of the number of options in each selection:
C = 10*10*10*5 = 5000 combinations.
