यदि (n\(A\cup B\)=75), (n\(A\cap B\)=18) और (n(A)=46) है, तो (n(B)) कितना है?

If (n\(A\cup B\)=75), (n\(A\cap B\)=18), and (n(A)=46), then what is (n(B))?

Explanation opens after your attempt
Correct Answer

A. (47)

Step 1

Concept

Using the formula, (75=46+n(B)-18). Hence (n(B)=47).

Step 2

Why this answer is correct

The correct answer is A. (47). Using the formula, (75=46+n(B)-18). Hence (n(B)=47).

Step 3

Exam Tip

सूत्र से (75=46+n(B)-18) मिलेगा। इसलिए (n(B)=47) है।

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यदि (n\(A\cup B\)=75), (n\(A\cap B\)=18) और (n(A)=46) है, तो (n(B)) कितना है? / If (n\(A\cup B\)=75), (n\(A\cap B\)=18), and (n(A)=46), then what is (n(B))?

Correct Answer: A. (47). Explanation: सूत्र से (75=46+n(B)-18) मिलेगा। इसलिए (n(B)=47) है। / Using the formula, (75=46+n(B)-18). Hence (n(B)=47).

Which concept should I revise for this Mathematics MCQ?

Using the formula, (75=46+n(B)-18). Hence (n(B)=47).

What exam hint can help solve this Mathematics question?

सूत्र से (75=46+n(B)-18) मिलेगा। इसलिए (n(B)=47) है।