A two-way eyesight table

A two-way eyesight table

Secondary 2
TGM Original Questions

The table shows a class.

Short-sightedNot short-sighted
Boys\(8\)\(12\)
Girls\(6\)\(14\)

One student is selected. Find the probability that the student is

  1. a boy,
  2. short-sighted,
  3. a boy or not short-sighted.

Solution:

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Answer:(i) \(1/2\); (ii) \(7/20\); (iii) \(17/20\).

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