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Question
How many numbers of four digits can be formed from the digits 0, 1, 2, 3, and 4?
How many numbers of four digits can be formed from the digits 0, 1, 2, 3, and 4?
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Solution
The correct option is C 96
The first box can be filled in four ways, because we cannot put 0 in the first box. The second box can also be filled in four ways, because we cannot put 0. The third box can be filled in three ways and the fourth in two ways. Therefore,
Total numbers = 4×4×3×2=96
The first box can be filled in four ways, because we cannot put 0 in the first box. The second box can also be filled in four ways, because we cannot put 0. The third box can be filled in three ways and the fourth in two ways. Therefore,
Total numbers = 4×4×3×2=96
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