Complement of set
Last updated at Jan. 27, 2020 by Teachoo
Example 21 Let U be universal set of all the students of Class XI of a coeducational school and A be the set of all girls in Class XI. Find A′. In a coeducational school, there can be only boys and girls in a school. A is the set of all girls, A′ = Set of all Students – Set of all girls A′ = Set of all boys in class XI.