यदि \(U={1,2,\ldots,18}\), (A'={2,3,5,7,11,13,17}), तो (A) में कितने अवयव हैं?

If \(U={1,2,\ldots,18}\), (A'={2,3,5,7,11,13,17}), how many elements are in (A)?

Explanation opens after your attempt
Correct Answer

C. (11)

Step 1

Concept

(|U|=18) and (|A'|=7), so (|A|=18-7=11). The count of a set is obtained by subtracting its complement from the total.

Step 2

Why this answer is correct

The correct answer is C. (11). (|U|=18) and (|A'|=7), so (|A|=18-7=11). The count of a set is obtained by subtracting its complement from the total.

Step 3

Exam Tip

(|U|=18) और (|A'|=7), इसलिए (|A|=18-7=11)। पूरक की संख्या कुल से घटाकर मिलती है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(U={1,2,\ldots,18}\), (A'={2,3,5,7,11,13,17}), तो (A) में कितने अवयव हैं? / If \(U={1,2,\ldots,18}\), (A'={2,3,5,7,11,13,17}), how many elements are in (A)?

Correct Answer: C. (11). Explanation: (|U|=18) और (|A'|=7), इसलिए (|A|=18-7=11)। पूरक की संख्या कुल से घटाकर मिलती है। / (|U|=18) and (|A'|=7), so (|A|=18-7=11). The count of a set is obtained by subtracting its complement from the total.

Which concept should I revise for this Mathematics MCQ?

(|U|=18) and (|A'|=7), so (|A|=18-7=11). The count of a set is obtained by subtracting its complement from the total.

What exam hint can help solve this Mathematics question?

(|U|=18) और (|A'|=7), इसलिए (|A|=18-7=11)। पूरक की संख्या कुल से घटाकर मिलती है।