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Subjects
Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsMedium
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The first row of an auditorium has (18) seats and each next row has (3) more seats. How many seats are in the (20)th row?

Answer and explanation

Correct answer: (75)

The seats form an AP and (a_{20}=18+19(3)=75). Exam tip: take the row number as (n) and find the (n)th term.

Related tags

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