Exact result
1,000,000,000
10 choices for 9 ordered positions gives 1,000,000,000.
Each of the 9 PIN positions has 10 choices. PINs like 123456789 and 987654321 are different, and repeated digits like 000000000 are allowed, so the total is 10^9.
Worked steps
Show your work
- Inputs: n = 10, r = 9
- Formula: n^r
- Substitute: 10^9
- Steps: multiply 10 by itself 9 times
- Result: 10 choices for 9 ordered positions gives 1,000,000,000.
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Each of the 9 PIN positions has 10 choices. PINs like 123456789 and 987654321 are different, and repeated digits like 000000000 are allowed, so the total is 10^9.
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