The number of significant numbers which can be formed by using any number of the digits 0, 1, 2, 3, 4 but using each not more than once in each number is
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Answer:
The appropriate answer is 120.
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Answer:
= (5P1 + 5P2 + 5P3 +5P4 + 5P5) − (1+ 4P1 + 4P2 + 4P3 + 4P4)
=5+20+60+120+120−(1+4+12+24+24)
= 260
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