NumericalModerate3 marks
The following table gives the marks scored by a set of students in an examination. Calculate the mean of the distribution by using the short cut method.
Topic: Mean / median / mode / quartiles
Previous-year question practice database
Answer
Solution diagram
Exam answer
Mean: calculate by the short-cut method from the given table.
Explanation
Use x̄ = A + (Σfd/Σf), with class marks and deviations from a convenient assumed mean. Keep the supplied table values visible in the worked solution.
More from Measure of Central Tendency (Mean, Median, Quartiles and Mode)
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