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MA_775_DIABLO [31]
1 year ago
13

A bank ATM system has a pad with 10 digits (0 to 9). Find the number of possible 4-digit pin codes

Mathematics
1 answer:
Mandarinka [93]1 year ago
7 0

Answer:

A

Step-by-step explanation:

If digits can be repeated, that means there are 10 options for each place in the pin code. 10*10*10*10 = 10,000

If digits can not be repeated, there are 10 options for the first digit, 9 options for the second digit, 8 options for the third digit, and 7 options for the fourth digit. 10*9*8*7 = 5040

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