यदि (n(A)=4) और (n(B)=5) है, तो (n\(A\times B\)) कितना होगा?

If (n(A)=4) and (n(B)=5), what is (n\(A\times B\))?

Explanation opens after your attempt
Correct Answer

B. (20)

Step 1

Concept

The number of elements in a Cartesian product is (n(A)n(B)). Here \(4\times 5=20\), so this is the correct answer.

Step 2

Why this answer is correct

The correct answer is B. (20). The number of elements in a Cartesian product is (n(A)n(B)). Here \(4\times 5=20\), so this is the correct answer.

Step 3

Exam Tip

कार्तीय गुणन में तत्वों की संख्या (n(A)n(B)) होती है। यहां \(4\times 5=20\), यही सही उत्तर है।

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Mathematics Answer, Explanation and Revision Hints

यदि (n(A)=4) और (n(B)=5) है, तो (n\(A\times B\)) कितना होगा? / If (n(A)=4) and (n(B)=5), what is (n\(A\times B\))?

Correct Answer: B. (20). Explanation: कार्तीय गुणन में तत्वों की संख्या (n(A)n(B)) होती है। यहां \(4\times 5=20\), यही सही उत्तर है। / The number of elements in a Cartesian product is (n(A)n(B)). Here \(4\times 5=20\), so this is the correct answer.

Which concept should I revise for this Mathematics MCQ?

The number of elements in a Cartesian product is (n(A)n(B)). Here \(4\times 5=20\), so this is the correct answer.

What exam hint can help solve this Mathematics question?

कार्तीय गुणन में तत्वों की संख्या (n(A)n(B)) होती है। यहां \(4\times 5=20\), यही सही उत्तर है।