Question

how many 4 digits can be formed using 0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 if repetition of the digits is not allowed​

Answer 1

Answer:

So the answer is: there are 720 4-digit integers that can be formed by the digits 0–6 with no repeats.

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Answer 2

Answer:

1. 1230
2. 5670

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