यदि \(U={x:x\in\mathbb{Z},-12\le x\le 12}\) और \(A={x:x\in U,x^2-9x+18\le 0}\), तो (n(A')) क्या है?

If \(U={x:x\in\mathbb{Z},-12\le x\le 12}\) and \(A={x:x\in U,x^2-9x+18\le 0}\), what is (n(A'))?

Explanation opens after your attempt
Correct Answer

A. (20)

Step 1

Concept

The inequality gives \(3\le x\le 6\), so (A) has (4) elements. Since (U) has (25) elements, (n(A')=25-4=21).

Step 2

Why this answer is correct

The correct answer is A. (20). The inequality gives \(3\le x\le 6\), so (A) has (4) elements. Since (U) has (25) elements, (n(A')=25-4=21).

Step 3

Exam Tip

असमानता से \(3\le x\le 6\) मिलता है, इसलिए (A) में (4) सदस्य हैं। (U) में (25) सदस्य हैं, अतः (n(A')=25-4=21) नहीं बल्कि (21) होता है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(U={x:x\in\mathbb{Z},-12\le x\le 12}\) और \(A={x:x\in U,x^2-9x+18\le 0}\), तो (n(A')) क्या है? / If \(U={x:x\in\mathbb{Z},-12\le x\le 12}\) and \(A={x:x\in U,x^2-9x+18\le 0}\), what is (n(A'))?

Correct Answer: A. (20). Explanation: असमानता से \(3\le x\le 6\) मिलता है, इसलिए (A) में (4) सदस्य हैं। (U) में (25) सदस्य हैं, अतः (n(A')=25-4=21) नहीं बल्कि (21) होता है। / The inequality gives \(3\le x\le 6\), so (A) has (4) elements. Since (U) has (25) elements, (n(A')=25-4=21).

Which concept should I revise for this Mathematics MCQ?

The inequality gives \(3\le x\le 6\), so (A) has (4) elements. Since (U) has (25) elements, (n(A')=25-4=21).

What exam hint can help solve this Mathematics question?

असमानता से \(3\le x\le 6\) मिलता है, इसलिए (A) में (4) सदस्य हैं। (U) में (25) सदस्य हैं, अतः (n(A')=25-4=21) नहीं बल्कि (21) होता है।