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Permutations and combinations
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Asked by navyaankita121993 | 08 Feb, 2021, 08:40: PM
answered-by-expert Expert Answer
It is given that ak does not have k element as a permutation.
It has 5 elements each with 2 possibilities (one of being the permutation and the other of not being the permutation).
So for each 5 elements 1, 2, 3, 4, 5, there are 2 possibilities.
Hence, the total number of permutations possible is 6! - 6C1 x 25 = 528
 

Since  a k  does not have k element as a permutation, it has 5 elements each with 2 possibilities (one of being in the permutation and the other of not being the permutation). Hence, total permutations possible are 

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