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CMA Foundation · Fundamentals of Business Mathematics and Statistics · Statistical Representation of Data

Marks of students are grouped into classes 10-20, 20-30, 30-40, 40-50 and 50-60 under the exclusive method. A student scoring exactly 40 marks is placed in which class?

The student belongs to the class 40-50. Under the exclusive method, the upper limit of each class is not included in that class, while the lower limit is included, so a score of exactly 40 moves into the next class, 40-50.

  1. A30-40
  2. B40-50Correct
  3. CBoth 30-40 and 40-50
  4. D50-60

Explanation

In the exclusive method the upper limit of a class is excluded and the lower limit is included. So a value of 40 is excluded from 30-40 and included in 40-50. The option 30-40 wrongly treats the upper limit as included.

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