Question

The no of 7 digited palindromes that can be formed using 0,1,2,3,4

Answer 1

Answer:

The number should be of the form ABCDCBA

Number of ways of selecting A are 4 as the possible digits are 1,2,3,4.

Number of ways of selecting B are 5 as 0 is also a possibility.

Similarly

Number of ways of selecting C is 5

Number of ways of selecting D is 5

Hence the number of ways =4×5×5×5=500

Explanation:

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