If n(A)=18 n(B)=14 and n(A ∩ B)=5 then what is n(A ∪ B)?
यदि n(A)=18 n(B)=14 और n(A ∩ B)=5 है तो n(A ∪ B) कितना होगा?
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Correct Answer
A. 27 / 27
ExplanationStep 1: This is based on the union formula of sets. Step 2: n(A ∪ B)=18+14-5=27 so option A is correct. Step 3: In union subtract the common part once.
Step 1: यह sets के union formula पर आधारित है। Step 2: n(A ∪ B)=18+14-5=27 इसलिए option A सही है। Step 3: Union में common part को एक बार घटाना याद रखें।