Published by:
CGP EDU Academic Team
Published on: August 14, 2026
In an examination, 5 students have been allotted their seats as per their roll numbers. The number of ways, in which none of the students sits on the allotted seat, is
Text Solution
Verified by ExpertsThe correct answer is:
44
(44)
5 boys with allotted roll numbers and seat numbers are seated in such a way that no one sits on the allotted seats. The number of ways of such seating arrangement is equal to the derangement of 5 boys i.e.,
= 5! -5! + 60-20 + 5- 1
= 44
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