For two sets A & B

n(A) = Number of elements of set A

n(B) = Number of elements of set B

 

n(A ∪ B) = n(A) + n(B) – n(A ∩ B)

 

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.