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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

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Application +4 | -1

The total number of

n

-digit numbers

(n > 1)

having the property that no two consecutive digits are same, is

View answer and explanation

Correct option: A

9^n

Option A (

9^n

) is correct because the first digit has 9 choices (1-9) and each subsequent digit also has 9 choices (0-9, excluding the previous digit).

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