Question

Сколько всего существует четырёхзначных чисел, в записи которых участвуют лишь цифры 1,2,3 и 4?

Answer 1

Ответ:

вот надеюсь что правильно

Answer 2

Total Number of Four-Digit Numbers with Only 1, 2, 3, and 4

To find the total number of four-digit numbers that can be formed using only the digits 1, 2, 3, and 4, we can use the formula for permutations of n objects taken r at a time, which is given by:

Total permutations = n! / (n - r)!

Where n is the total number of digits available and r is the number of digits to be used.

Using this formula, we can calculate the total number of four-digit numbers that can be formed using the digits 1, 2, 3, and 4.

The total number of permutations can be calculated as follows:

Total permutations = 4! / (4 - 4)!

Total permutations = 4! / 0!

Total permutations = 24 / 1

Total permutations = 24

Therefore, there are 24 four-digit numbers that can be formed using only the digits 1, 2, 3, and 4.