Ask Question
26 July, 06:33

A lock on a fence door has a 4 digit combination. Each digit can be any number

between 0 - 9. The only restriction is that all 4 characters cannot be the same

(e. g. 1111, 2222, 3333, etc.). How many combinations are possible?

504

512

10000

9990

+5
Answers (1)
  1. 26 July, 06:49
    0
    9990

    Step-by-step explanation:

    Each number combination is 0 to 9. For each combination, it is 10^X. In your problem there are 4 digits. That means it is it is 10^4 = 10000, but because there is a stipulation that the numbers cannot be identical then we have to remove it from the possible combinations. So there are 10 possible identical number combinations. 10000 - 10 = 9990
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A lock on a fence door has a 4 digit combination. Each digit can be any number between 0 - 9. The only restriction is that all 4 characters ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers