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- Answer please! - Sets, Relations and Functions - JEE Main-4
- #All India Pre Medical Test
- #Sets, Relations and Functions
- #Joint Entrance Examination Main
- #Engineering
- #Maths
Given n(A)=50,n(B)=30 and n(AUB)=x such that n(AB)=20. Find x
- Option 1)
20
- Option 2)
40
- Option 3)
60
- Option 4)
80
Answers (1)
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)
x=50+30-20=60
Option 1)
20
Option 2)
40
Option 3)
60
Option 4)
80
View full answer
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