यदि (|U|=80), (|A|=35), (|B|=40) और \(|A\cap B|=15\), तो (|\(A\cup B\)'|) कितना है?

If (|U|=80), (|A|=35), (|B|=40) and \(|A\cap B|=15\), what is (|\(A\cup B\)'|)?

Explanation opens after your attempt
Correct Answer

A. (20)

Step 1

Concept

\(|A\cup B|=35+40-15=60\), so the complement has (80-60=20) elements. Find the union count first.

Step 2

Why this answer is correct

The correct answer is A. (20). \(|A\cup B|=35+40-15=60\), so the complement has (80-60=20) elements. Find the union count first.

Step 3

Exam Tip

\(|A\cup B|=35+40-15=60\), इसलिए पूरक में (80-60=20) अवयव हैं। पहले संघ की संख्या निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि (|U|=80), (|A|=35), (|B|=40) और \(|A\cap B|=15\), तो (|\(A\cup B\)'|) कितना है? / If (|U|=80), (|A|=35), (|B|=40) and \(|A\cap B|=15\), what is (|\(A\cup B\)'|)?

Correct Answer: A. (20). Explanation: \(|A\cup B|=35+40-15=60\), इसलिए पूरक में (80-60=20) अवयव हैं। पहले संघ की संख्या निकालें। / \(|A\cup B|=35+40-15=60\), so the complement has (80-60=20) elements. Find the union count first.

Which concept should I revise for this Mathematics MCQ?

\(|A\cup B|=35+40-15=60\), so the complement has (80-60=20) elements. Find the union count first.

What exam hint can help solve this Mathematics question?

\(|A\cup B|=35+40-15=60\), इसलिए पूरक में (80-60=20) अवयव हैं। पहले संघ की संख्या निकालें।