यदि \(U={x:x\in \mathbb{N},1\le x\le 20}\) और \(A={x:x\in U,x>12}\) है, तो (n(A')) कितना है?

If \(U={x:x\in \mathbb{N},1\le x\le 20}\) and \(A={x:x\in U,x>12}\), what is (n(A'))?

Explanation opens after your attempt
Correct Answer

A. (12)

Step 1

Concept

\(A={13,14,\ldots,20}\) has (8) elements, so (A') has (12) elements. (x>12) does not include (12).

Step 2

Why this answer is correct

The correct answer is A. (12). \(A={13,14,\ldots,20}\) has (8) elements, so (A') has (12) elements. (x>12) does not include (12).

Step 3

Exam Tip

\(A={13,14,\ldots,20}\) में (8) अवयव हैं, इसलिए (A') में (12) अवयव होंगे। (x>12) में (12) शामिल नहीं है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(U={x:x\in \mathbb{N},1\le x\le 20}\) और \(A={x:x\in U,x>12}\) है, तो (n(A')) कितना है? / If \(U={x:x\in \mathbb{N},1\le x\le 20}\) and \(A={x:x\in U,x>12}\), what is (n(A'))?

Correct Answer: A. (12). Explanation: \(A={13,14,\ldots,20}\) में (8) अवयव हैं, इसलिए (A') में (12) अवयव होंगे। (x>12) में (12) शामिल नहीं है। / \(A={13,14,\ldots,20}\) has (8) elements, so (A') has (12) elements. (x>12) does not include (12).

Which concept should I revise for this Mathematics MCQ?

\(A={13,14,\ldots,20}\) has (8) elements, so (A') has (12) elements. (x>12) does not include (12).

What exam hint can help solve this Mathematics question?

\(A={13,14,\ldots,20}\) में (8) अवयव हैं, इसलिए (A') में (12) अवयव होंगे। (x>12) में (12) शामिल नहीं है।