How many four digits numbers can be formed out of 56789 if no digits can be repeated?

Answer 1

To form a four-digit number without repeating any digits from 56789, we need to choose 4 different digits out of the 5 available. This can be done in 5 choose 4 ways, which is equal to 5! / (4! * (5-4)!) = 5 ways. Therefore, there are 5 four-digit numbers that can be formed out of 56789 without repeating any digits.

Answer 2

5P4 where P is the permutation operator = 5!/(5-4)! = 5! = 5 x 4 x 3 x 2 x 1 = 120.

Answer 3

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