Answer-Find the number of 3-digit numbers that can be formed using the digits 0, 1, 4, 5, 7 such that repet...

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The first digit hundreds place cannot be 0 it must be 1, 4, 5, or 7  4 choices.  The second digit can be any of the remaining 4 digits.  The third digit can be any of the remaining 3 digits.  So, total numbers 443484 times 4 times 3  48 44348

Find the number of 3-digit numbers that can be formed using the digits 0, 1, 4, 5, 7 such that repetition of digits is not allowed.

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