यदि (n(U)=30) और (n(A)=18) है, तो (n(A')) कितना होगा?

If (n(U)=30) and (n(A)=18), what is (n(A'))?

Explanation opens after your attempt
Correct Answer

A. (12)

Step 1

Concept

(n(A')=n(U)-n(A)=30-18=12). For complement, subtract rather than add.

Step 2

Why this answer is correct

The correct answer is A. (12). (n(A')=n(U)-n(A)=30-18=12). For complement, subtract rather than add.

Step 3

Exam Tip

(n(A')=n(U)-n(A)=30-18=12)। पूरक में जोड़ नहीं, घटाना होता है।

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Mathematics Answer, Explanation and Revision Hints

यदि (n(U)=30) और (n(A)=18) है, तो (n(A')) कितना होगा? / If (n(U)=30) and (n(A)=18), what is (n(A'))?

Correct Answer: A. (12). Explanation: (n(A')=n(U)-n(A)=30-18=12)। पूरक में जोड़ नहीं, घटाना होता है। / (n(A')=n(U)-n(A)=30-18=12). For complement, subtract rather than add.

Which concept should I revise for this Mathematics MCQ?

(n(A')=n(U)-n(A)=30-18=12). For complement, subtract rather than add.

What exam hint can help solve this Mathematics question?

(n(A')=n(U)-n(A)=30-18=12)। पूरक में जोड़ नहीं, घटाना होता है।