Question

How many 2-digit numbers can be formed using only the digits 2, 3, 5, and 6, if the digits are not be repeated within a number? A. 11 B. 12 C. 10 D. 2

Answer 1

B. 12

Explanation:

There are 4 choices for the first digit (2, 3, 5, or 6) and 3 choices for the second digit (any of the remaining 3 digits that were not used for the first digit). Therefore, there are a total of 4 × 3 = 12 different 2-digit numbers that can be formed using only the digits 2, 3, 5, and 6 without repeating digits within a number. So the correct answer is B. 12.