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To calculate the number of 3-digit combinations that can be made from the numbers 1-9, we can use the formula for permutations. Since repetition is allowed, we use the formula for permutations with repetition, which is n^r, where n is the total number of options (10 in this case) and r is the number of digits in each combination (3 in this case). Therefore, the total number of 3-digit combinations that can be made from the numbers 1-9 is 10^3 = 1000.
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Continue Learning about Statistics
How many combinations of three digits can be made from the numbers 123?
6
How many 2 digit combinations can be made with 2 digits?
Only one.
How many combinations of four digits can be made from the numbers 1-9?
10
How many combinations of three digits can be made from numbers 1 - 3?
Six combinations: 123, 132, 213, 231, 312, 321
How many 4 digit combinations can be made using numbers 1 2 3 4 6?
120 combinations using each digit once per combination. There are 625 combinations if you can repeat the digits.
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