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The number of different four-digit numbers that can be formed with the digits $2,3,4,7$ and using each digit only once is
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The correct answer is:
24
24
Since, four-digit numbers is formed using digits. 2,3 , 4 and 7
So, required number of numbers $={ }^4 P_4=24$
So, required number of numbers $={ }^4 P_4=24$
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