Q. |
How many 4 digit numbers can be formed using the digits 1, 2, 3, 4? |
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A. 256 |
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B. 64 |
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C. 192 |
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D. 24 |
Note: whenever using/with the digits/given the digits is asked, repetition is not allowed.
Ans: 4 × 3 × 2 × 1 = 24