Answer:
24 three-digit numbers
Step-by-step explanation:
- The first digit of the arrangement can be any 1 of 4 integers.
- The second digit can now be any 1 of 3 integers. So the first two numbers can be a combination of 4 × 3 numbers or 12 arrangements.
- The third digit can be any 1 of the 2 remaining integers. So the first three numbers can be a combination of 4 × 3 × 2 numbers or 24 arrangements.
Therefore, we can form 24 three-digit numbers using integers 2, 3, 4, and 7.
I hope it helps! Thank you! ❤️