\(यदि (U={x:x \in \mathbb{N}, 1\le x\le 20}) और (A={x:x \in U,\ x\) 20 का गुणनखंड है\(}), तो (A^{c}) में कितने अवयव होंगे\)?

\(If (U={x:x \in \mathbb{N}, 1\le x\le 20}) and (A={x:x \in U, x\) is a factor of \(20}), how many elements will (A^{c}) have\)?

Explanation opens after your attempt
Correct Answer

C. (14)

Step 1

Concept

The factors of (20) are ({1,2,4,5,10,20}), so (n(A)=6). Hence (n\(A^{c}\)=20-6=14).

Step 2

Why this answer is correct

The correct answer is C. (14). The factors of (20) are ({1,2,4,5,10,20}), so (n(A)=6). Hence (n\(A^{c}\)=20-6=14).

Step 3

Exam Tip

(20) के गुणनखंड ({1,2,4,5,10,20}) हैं, इसलिए (n(A)=6)। अतः (n\(A^{c}\)=20-6=14)।

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Mathematics Answer, Explanation and Revision Hints

\(यदि (U={x:x \in \mathbb{N}, 1\le x\le 20}) और (A={x:x \in U,\ x\) 20 का गुणनखंड है}), तो \(A^{c}\) में कितने अवयव होंगे? \(/ If (U={x:x \in \mathbb{N}, 1\le x\le 20}) and (A={x:x \in U, x\) is a factor of \(20}), how many elements will (A^{c}) have\)?

Correct Answer: C. (14). Explanation: (20) के गुणनखंड ({1,2,4,5,10,20}) हैं, इसलिए (n(A)=6)। अतः (n\(A^{c}\)=20-6=14)। / The factors of (20) are ({1,2,4,5,10,20}), so (n(A)=6). Hence (n\(A^{c}\)=20-6=14).

Which concept should I revise for this Mathematics MCQ?

The factors of (20) are ({1,2,4,5,10,20}), so (n(A)=6). Hence (n\(A^{c}\)=20-6=14).

What exam hint can help solve this Mathematics question?

(20) के गुणनखंड ({1,2,4,5,10,20}) हैं, इसलिए (n(A)=6)। अतः (n\(A^{c}\)=20-6=14)।