Age frequencies with two unknowns

Age frequencies with two unknowns

Secondary 2
TGM Original Questions

The ages 13,14,15,16 occur with frequencies 3, \(x\), \(y\), 4, for 20 students.

  1. Given that 15 is the unique mode, write an inequality involving \(x\) and \(y\).
  2. If 40% of the students are aged 15, find \(x\) and \(y\).

Solution:

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Answer:(a) \(y>\max(x,4)\); (b) \(x=5,y=8\).

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