Answers

  • Brainly User
2015-05-25T09:12:16+05:30
Answer :
     n(X) = 40
     n(Y) = ?    
X ∪ Y = 60
X ∩ Y = 10 

we know that ,
 
X ∪ Y = n(X) + n(Y) -
X ∩ Y

substitute the values , we get
60 = 40 + n(Y) - 10
 60 = 50 + n(Y)
or 60 - 50 = n(Y)
or 10 = n(Y)
or n(Y) = 10 .

hence Set Y has 10 elements .

Thank You!!

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