If U is the universal set,n(A)=50,n(B)=60 and n(AB)=30. Total elements in universal set are 200. Find
80
100
120
140
As we learnt
Number of Elements in Union A & B -
n (A ∪ B) = n (A) + n (B) – n (A ∩ B)
- wherein
Given A and B be any finite sets. then Number of Elements in union A & B is given by this formula.
n (A ∪ B) = n (A) + n (B) – n (A ∩ B)
=50+60-30=80
=200-80=120
Option 1)
80
Option 2)
100
Option 3)
120
Option 4)
140
Study 40% syllabus and score up to 100% marks in JEE