एक थिएटर की पहली पंक्ति में (18) सीटें हैं और हर अगली पंक्ति में (2) सीटें अधिक हैं। (12)वीं पंक्ति में कितनी सीटें होंगी?

The first row of a theatre has (18) seats and each next row has (2) more seats. How many seats are in the (12)th row?

Explanation opens after your attempt
Correct Answer

B. (40)

Step 1

Concept

The number of seats forms an AP. (a_{12}=18+11(2)=40).

Step 2

Why this answer is correct

The correct answer is B. (40). The number of seats forms an AP. (a_{12}=18+11(2)=40).

Step 3

Exam Tip

सीटों की संख्या समान्तर श्रेणी है। (a_{12}=18+11(2)=40)।

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Mathematics Answer, Explanation and Revision Hints

एक थिएटर की पहली पंक्ति में (18) सीटें हैं और हर अगली पंक्ति में (2) सीटें अधिक हैं। (12)वीं पंक्ति में कितनी सीटें होंगी? / The first row of a theatre has (18) seats and each next row has (2) more seats. How many seats are in the (12)th row?

Correct Answer: B. (40). Explanation: सीटों की संख्या समान्तर श्रेणी है। (a_{12}=18+11(2)=40)। / The number of seats forms an AP. (a_{12}=18+11(2)=40).

Which concept should I revise for this Mathematics MCQ?

The number of seats forms an AP. (a_{12}=18+11(2)=40).

What exam hint can help solve this Mathematics question?

सीटों की संख्या समान्तर श्रेणी है। (a_{12}=18+11(2)=40)।