How many 3-digit even numbers can be formed using the digits 1, 2, 3, 4, 5 and 6 without repetition?
Correct answer D. 60
Explanation
The units digit must be 2, 4 or 6 (3 ways); the other two places are then filled in 5 x 4 ways: 3 x 20 = 60.
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