यदि (n\(A\setminus B\)=12), (n\(B\setminus A\)=9) और (n\(A\cap B\)=6) है, तो (n\(A\cup B\)) कितना है?

If (n\(A\setminus B\)=12), (n\(B\setminus A\)=9), and (n\(A\cap B\)=6), then what is (n\(A\cup B\))?

Explanation opens after your attempt
Correct Answer

A. (27)

Step 1

Concept

The union is the sum of these three disjoint parts. Therefore (n\(A\cup B\)=12+9+6=27).

Step 2

Why this answer is correct

The correct answer is A. (27). The union is the sum of these three disjoint parts. Therefore (n\(A\cup B\)=12+9+6=27).

Step 3

Exam Tip

संघ इन तीन असंबद्ध भागों का योग है। इसलिए (n\(A\cup B\)=12+9+6=27)।

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Mathematics Answer, Explanation and Revision Hints

यदि (n\(A\setminus B\)=12), (n\(B\setminus A\)=9) और (n\(A\cap B\)=6) है, तो (n\(A\cup B\)) कितना है? / If (n\(A\setminus B\)=12), (n\(B\setminus A\)=9), and (n\(A\cap B\)=6), then what is (n\(A\cup B\))?

Correct Answer: A. (27). Explanation: संघ इन तीन असंबद्ध भागों का योग है। इसलिए (n\(A\cup B\)=12+9+6=27)। / The union is the sum of these three disjoint parts. Therefore (n\(A\cup B\)=12+9+6=27).

Which concept should I revise for this Mathematics MCQ?

The union is the sum of these three disjoint parts. Therefore (n\(A\cup B\)=12+9+6=27).

What exam hint can help solve this Mathematics question?

संघ इन तीन असंबद्ध भागों का योग है। इसलिए (n\(A\cup B\)=12+9+6=27)।