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₹900 was distributed equally among the students in a class. If there had been 6 fewer students, each student would have received ₹5 more. What was the original number of students?

Answer and explanation

Correct answer: 36

Let the original number of students be \(x\). The original share is \(\frac{900}{x}\), while the share after 6 students leave is \(\frac{900}{x-6}\). Thus, \(\frac{900}{x-6}-\frac{900}{x}=5\). Simplifying gives \(x^2-6x-1080=0\), or \((x-36)(x+30)=0\). Therefore, \(x=36\), since the number of students must be positive and greater than 6; \(x=-30\) is inadmissible. Exam tip: In distribution problems, express each person’s share as total amount divided by the number of people.

Related tags

Quadratic-EquationsWord-ProblemsMoney-DistributionLinear-FractionsWord Problems And ApplicationsQuadratic EquationsMathematicsClass 10 Mcq

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