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Derangement Archives - Best Maths Practice Material

Derangement

Principle of Inclusion and Exclusion
class 11th
IITJEE
Podcast

Principle of Inclusion and Exclusion .

Inclusion and Exclusion principle The principle of inclusion and exclusion  is a counting technique in which the elements satisfy at least one of the different properties while counting elements satisfying more than one property are counted exactly once. For example if we want to count number of numbers in first $100$ natural numbers which are either […]

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