यदि (n\(A\setminus B\)=12), (n\(A\cap B\)=7) और (n\(B\setminus A\)=16) हैं, तो (n\(A\cup B\)) क्या है?
If (n\(A\setminus B\)=12), (n\(A\cap B\)=7), and (n\(B\setminus A\)=16), what is (n\(A\cup B\))?
Explanation opens after your attempt
A. (35)
Concept
The union is the sum of three disjoint parts. Therefore (n\(A\cup B\)=12+7+16=35).
Why this answer is correct
The correct answer is A. (35). The union is the sum of three disjoint parts. Therefore (n\(A\cup B\)=12+7+16=35).
Exam Tip
संघ तीन अलग-अलग भागों का योग है। इसलिए (n\(A\cup B\)=12+7+16=35)।
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