Solved . Recall that ni (called subfactorial) is the number | Chegg.com
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Maths Ed X પર: "The 265th, or subfactorial 6-th (!6-th) day of the year. There are 265 derangements of 6 objects: 265 ways 6 objects can be arranged so no object is
1. Recall that ni (called subfactorial) is the number | Chegg.com
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