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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsMedium
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In a chair arrangement the first row has (9) chairs and each next row has (3) more chairs. If there are (306) chairs in total then how many rows are there?

Answer and explanation

Correct answer: (12)

Putting (S_n=306) in the sum formula gives (n=12). Exam tip: you can also check options in the sum formula.

Related tags

ApWord-ProblemArrangementWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematicsClass 10 Mcq
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