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In a hall, the (1)st row has (1) seat and the (26)th row has (26) seats. How many seats are there in all rows?
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Answer and explanation
Correct answer: (351)
Total seats are (S_{26}=\frac{26\times27}{2}=351). If seats equal the row number, use (S_n).
Frequently asked questions
What is the correct answer to this question?
(351)
Why is this the correct answer?
Total seats are (S_{26}=\frac{26\times27}{2}=351). If seats equal the row number, use (S_n).
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Sum of first n natural numbers.
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