यदि (n(A-B)=x), (n(B-A)=2x), (n\(A\cap B\)=15) और (n\(A\cup B\)=75) है, तो (x) कितना है?
If (n(A-B)=x), (n(B-A)=2x), (n\(A\cap B\)=15), and (n\(A\cup B\)=75), what is (x)?
Explanation opens after your attempt
B. (20)
Concept
From the union regions, (x+2x+15=75), so (3x=60) and (x=20). Solve unknown regions by forming an equation.
Why this answer is correct
The correct answer is B. (20). From the union regions, (x+2x+15=75), so (3x=60) and (x=20). Solve unknown regions by forming an equation.
Exam Tip
संघ के भागों से (x+2x+15=75), इसलिए (3x=60) और (x=20)। अज्ञात क्षेत्र को समीकरण से हल करें।
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