Solving a hundred-pupil frequency table

Solving a hundred-pupil frequency table

Secondary 2
TGM Original Questions

Study hours 3,4,5,6 have frequencies \(42,x,y,18\) for 100 pupils. The mean is 4.3.

  1. Form two equations and solve for \(x,y\).
  2. State the mode and median.
  3. A pupil claims more than one quarter studied 5 hours. Is the claim correct?

Solution:

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Answer:(a) \(x=4,y=36\); (b) mode \(3\), median \(5\); (c) yes, \(36\%>25\%\).

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