JEE MATHEMATICS MCQ: PERMUTATIONS

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Application +4 | -1

The number of four-digit numbers that can be made with the digits

1,2,3,4

and 5 in which atleast two digits are identical, is

View answer and explanation

Correct option: B

505

Option B (505) is correct because it calculates the number of four-digit numbers with at least two identical digits by subtracting the number of numbers with distinct digits from the total number of possible numbers.

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