यदि (n(A)=7) और (n(B)=3) है, तो (n\(A\times B\)) कितना होगा?

If (n(A)=7) and (n(B)=3), what is (n\(A\times B\))?

Explanation opens after your attempt
Correct Answer

B. (21)

Step 1

Concept

For finite sets, (n\(A\times B\)=n(A)n(B)). Therefore, \(7\times 3=21\).

Step 2

Why this answer is correct

The correct answer is B. (21). For finite sets, (n\(A\times B\)=n(A)n(B)). Therefore, \(7\times 3=21\).

Step 3

Exam Tip

सीमित समुच्चयों के लिए (n\(A\times B\)=n(A)n(B))। इसलिए \(7\times 3=21\)।

Question me issue ya doubt hai?

Answer, explanation, typing mistake ya suggestion directly hamari team ko bhejein. 📱Helpline (Call / WhatsApp): +91 7272824365

Related Mathematics Questions

FAQs

Mathematics Answer, Explanation and Revision Hints

यदि (n(A)=7) और (n(B)=3) है, तो (n\(A\times B\)) कितना होगा? / If (n(A)=7) and (n(B)=3), what is (n\(A\times B\))?

Correct Answer: B. (21). Explanation: सीमित समुच्चयों के लिए (n\(A\times B\)=n(A)n(B))। इसलिए \(7\times 3=21\)। / For finite sets, (n\(A\times B\)=n(A)n(B)). Therefore, \(7\times 3=21\).

Which concept should I revise for this Mathematics MCQ?

For finite sets, (n\(A\times B\)=n(A)n(B)). Therefore, \(7\times 3=21\).

What exam hint can help solve this Mathematics question?

सीमित समुच्चयों के लिए (n\(A\times B\)=n(A)n(B))। इसलिए \(7\times 3=21\)।