यदि (n(A)=32), (n\(A\cup B\)=48), और (n\(A\cap B\)=10), तो (n(B)) क्या है?
If (n(A)=32), (n\(A\cup B\)=48), and (n\(A\cap B\)=10), what is (n(B))?
Explanation opens after your attempt
B. (26)
Concept
From (48=32+n(B)-10), we get (n(B)=26). Isolate the unknown in the union formula.
Why this answer is correct
The correct answer is B. (26). From (48=32+n(B)-10), we get (n(B)=26). Isolate the unknown in the union formula.
Exam Tip
सूत्र (48=32+n(B)-10) से (n(B)=26) मिलता है। संघ के सूत्र में अज्ञात को अलग करें।
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