Question: 9) How many 4-digit numbers can be formed using {2, 3, 4, 5, 6, 7, 8} such that the first and last digits are even

9) How many 4-digit numbers can be formed using {2, 3, 4, 5, 6, 7, 8} such that the first and last digits are even digits and second and third digits are odd? (repetition not allowed) [2 Marks]

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