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FrozenT [24]
2 years ago
14

A combination lock has four wheels in a row. Each wheel has the digits from 0 to 9 on it. How many different combinations are th

ere?
(b)How many different combinations are there if we can only use each digit once?
Mathematics
1 answer:
sattari [20]2 years ago
7 0

Answer:

Step-by-step explanation:

a.10^4=10000

b.10×9×8×7=5040

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