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Earn +20 ptsQ: How many combinations of four digits can be made from the numbers 1-9?
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How many combinations of three digits can be made from the numbers 123?
6
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 numbers combinations can be made using 1234567?
Not repeating, it is 7*6*5*4 which is 840 ways ---- There are 7 choices for each of four digits, right? 74 = 2401
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.
How many license plates can be made using either two uppercase English letters followed by four digits or two digits followed by four uppercase English letters?
How many license plates can be made using either two uppercase English letters followed by four digits or two digits followed by four uppercase English letters?
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