How many three-digit numbers can be formed by python1234 without repetition?

In Python, the number of non-repeating three-digit numbers that can be formed by these four numbers 1234 is: 24. Calculation steps: 1. The number of optional digits in the first digit is 4; 2. The number of optional digits in the second digit is 3; 3. The number of optional digits in the third digit is 2; 4. The number of three-digit combinations = 4 × 3 × 2 = 24.

The three-digit number composed of Python1234 does not repeat

How many numbers can be used to form the four numbers 1234 in Python three digits, with each number unique?

Calculation method:

• Step one: Determine the number of optional digits for each digit

  • The first digit: there are 4 numbers to choose from (1, 2, 3, 4)
  • The second digit: the remaining 3 numbers are optional (except the first digit which has been
  • The third digit: the remaining 2 digits are optional (except the first two digits have been selected)

• Second step: Calculate the number of combinations

  • The number of three-digit combinations = the number of first digitsThe number of second digitsThe number of third digits
  • Three-digit combination number = 4 3 2 = 24

Therefore, the four numbers 1234 in Python can be composed24three-digit numbers, and each number does not repeat.

The above is the detailed content of How many three-digit numbers can be formed by python1234 without repetition?. For more information, please follow other related articles on the PHP Chinese website!