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A nursery sells (14) pots on the first day and (3) more pots each next day. How many pots are sold in (10) days?

Answer and explanation

Correct answer: 275

The number of pots sold each day forms an arithmetic progression with first term \(a=14\), common difference \(d=3\), and \(n=10\) days. Thus, \(S_{10}=\frac{10}{2}[2(14)+(10-1)(3)] = 5(28+27)=275\). Therefore, 275 is the correct answer. A common error leading to 280 is counting the terms or common differences incorrectly. Exam tip: for the total of an AP, use \(S_n=\frac{n}{2}[2a+(n-1)d]\).

Related tags

Arithmetic ProgressionAp Word ProblemsSum Of TermsClass 10 MathematicsWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics

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