Combinatoricsmedium
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How many 4-digit even numbers can be formed using {1, 2, 3, 4, 5, 6} if digits cannot repeat?
How many 4-digit even numbers can be formed using {1, 2, 3, 4, 5, 6} if digits cannot repeat?
How many 4-digit even numbers can be formed using {1, 2, 3, 4, 5, 6} if digits cannot repeat?