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In a hall, the (1)st row has (1) chair and the (32)nd row has (32) chairs. How many chairs are there in all rows?
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Answer and explanation
Correct answer: (528)
Total chairs are (S_{32}=\frac{32\times33}{2}=528). A pattern increasing by row number forms (S_n).
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What is the correct answer to this question?
(528)
Why is this the correct answer?
Total chairs are (S_{32}=\frac{32\times33}{2}=528). A pattern increasing by row number forms (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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