Gate2020 cs Q43

0. The number of permutations of the characters in LILAC so that no characters appears in its original position, if the two L’s are indistinguishable, is _______.

Note – Numerical Type question

Answer
Comment
Array

Option : D
Explanation :
LILAC
IAC
3! + LLAC
3 + 4/2 + 3 + 4/2 + 4/2
3 + 2 + 3 + 2 + 2 = 12

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