यदि (n(U)=80) और (n(A')=19) है, तो (n(A)) कितना होगा?

If (n(U)=80) and (n(A')=19), what is (n(A))?

Explanation opens after your attempt
Correct Answer

C. (61)

Step 1

Concept

(A) and (A') together form the whole (U). So (n(A)=80-19=61).

Step 2

Why this answer is correct

The correct answer is C. (61). (A) and (A') together form the whole (U). So (n(A)=80-19=61).

Step 3

Exam Tip

(A) और (A') मिलकर पूरा (U) बनाते हैं। इसलिए (n(A)=80-19=61)।

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Mathematics Answer, Explanation and Revision Hints

यदि (n(U)=80) और (n(A')=19) है, तो (n(A)) कितना होगा? / If (n(U)=80) and (n(A')=19), what is (n(A))?

Correct Answer: C. (61). Explanation: (A) और (A') मिलकर पूरा (U) बनाते हैं। इसलिए (n(A)=80-19=61)। / (A) and (A') together form the whole (U). So (n(A)=80-19=61).

Which concept should I revise for this Mathematics MCQ?

(A) and (A') together form the whole (U). So (n(A)=80-19=61).

What exam hint can help solve this Mathematics question?

(A) और (A') मिलकर पूरा (U) बनाते हैं। इसलिए (n(A)=80-19=61)।