Mathematics · Permutations and Combinations
A five-digit number is to be formed according to the following conditions: (I) The digit 0 cannot be the leftmost digit. (II) The middle digit must be 3. (III) If the unit digit is 2, the leftmost digit must be 1. (IV) Repetition of digits is not allowed. How many such five-digit numbers can be formed?
- 12394
- 22436
- 32760
- 42688✓
Correct answer
2688
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