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Subjects
Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsMedium
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A machine makes (95) packets in the first hour and (5) fewer packets each next hour. What is the total production in the first (9) hours?

Answer and explanation

Correct answer: (675)

The production is the decreasing AP (95,90,85,\ldots) and (S_9=675). Exam tip: treat a decrease as a negative common difference.

Related tags

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