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unknown-element MCQ Questions for Class 11

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Question 1/1 Medium Mathematics Sets The Empty Set, Finite and Infinite Sets, Equal Sets Class 11 Level 5

यदि \(A=\{1,2,a\}\) और \(B=\{2,1,3\}\) समान समुच्चय हैं, तो (a) का मान क्या है?

If \(A=\{1,2,a\}\) and \(B=\{2,1,3\}\) are equal sets, what is the value of (a)?

Explanation opens after your attempt
Correct Answer

A. (3)

Step 1

Concept

The distinct elements of (B) are (1,2,3).

Step 2

Why this answer is correct

To make (A) equal to (B), the third distinct element must be (3).

Step 3

Exam Tip

In equal sets, order may change but elements cannot. चरण 1: (B) में अलग तत्व (1,2,3) हैं। चरण 2: (A) को समान बनाने के लिए तीसरा अलग तत्व (3) होना चाहिए। चरण 3: समान समुच्चय में केवल क्रम बदल सकता है, तत्व नहीं।

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