Set Cardinality Union Intersection (Jee Mains) | ExamDuo
Sets & Relations
Medium
Set Cardinality Union Intersection
Let
50
U
i=1
Xi=
n
U
i=1
Yi=T, where each Xi contains 10elements and each Yi contains 5 elements. Ifeach element of the set T is an element ofexactly 20 of sets Xi 's and exactly 6 of sets Yi′s then n is equal to :