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Permutations — MATHS STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceMATHSPermutations1 Mark
Question
Write the number of 5 digit numbers that can be formed using digits 0, 1 and 2.
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Answer

Total number of digits $=3$ Now, zero can not be first digit of the 5 digit numbers. $\therefore$ The number of 5 digit numbers $=2 \times 3 \times 3 \times 3 \times 3=2 \times 3^4$

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