यदि (n(U)=240), (n\(A\cup B\)=157) और (n\(A^c\cap B^c\)=83) है, तो कौन सा संबंध सत्य है?
If (n(U)=240), (n\(A\cup B\)=157), and (n\(A^c\cap B^c\)=83), which relation is true?
Explanation opens after your attempt
A. (n\(A\cup B\)+n\(A^c\cap B^c\)=n(U))
Concept
Since (A^c\cap B^c=\(A\cup B\)^c), (157+83=240) is true. Complementary regions together form the whole (U).
Why this answer is correct
The correct answer is A. (n\(A\cup B\)+n\(A^c\cap B^c\)=n(U)). Since (A^c\cap B^c=\(A\cup B\)^c), (157+83=240) is true. Complementary regions together form the whole (U).
Exam Tip
क्योंकि (A^c\cap B^c=\(A\cup B\)^c), इसलिए (157+83=240) सही है। पूरक क्षेत्र मिलकर पूरा (U) बनाते हैं।
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