यदि \(A=\{1,2,3,4\}\) है और \(A\times B\) में कुल (28) अवयव हैं, तो (|B|) क्या होगा?

If \(A=\{1,2,3,4\}\) and \(A\times B\) has (28) elements, what is (|B|)?

Explanation opens after your attempt
Correct Answer

B. (7)

Step 1

Concept

Since (|A|=4) and \(4\cdot|B|=28\), we get (|B|=7). Divide to find the unknown cardinality.

Step 2

Why this answer is correct

The correct answer is B. (7). Since (|A|=4) and \(4\cdot|B|=28\), we get (|B|=7). Divide to find the unknown cardinality.

Step 3

Exam Tip

(|A|=4) और \(4\cdot|B|=28\), इसलिए (|B|=7)। अज्ञात कार्डिनलिटी के लिए भाग करें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4\}\) है और \(A\times B\) में कुल (28) अवयव हैं, तो (|B|) क्या होगा? / If \(A=\{1,2,3,4\}\) and \(A\times B\) has (28) elements, what is (|B|)?

Correct Answer: B. (7). Explanation: (|A|=4) और \(4\cdot|B|=28\), इसलिए (|B|=7)। अज्ञात कार्डिनलिटी के लिए भाग करें। / Since (|A|=4) and \(4\cdot|B|=28\), we get (|B|=7). Divide to find the unknown cardinality.

Which concept should I revise for this Mathematics MCQ?

Since (|A|=4) and \(4\cdot|B|=28\), we get (|B|=7). Divide to find the unknown cardinality.

What exam hint can help solve this Mathematics question?

(|A|=4) और \(4\cdot|B|=28\), इसलिए (|B|=7)। अज्ञात कार्डिनलिटी के लिए भाग करें।