Frequency conditions on test scores

Frequency conditions on test scores

Secondary 2
TGM Original Questions

Scores 4,6,7,8,9 have frequencies \(5,x,4,3,2\). Conditions are independent. Find

  1. \(x\) if the median is 6.5,
  2. the least \(x\) if 6 is the unique mode,
  3. the mean if the number scoring 6 is half the number scoring 7.

Solution:

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Answer:(a) \(4\); (b) \(6\); (c) \(6.375\).

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