Tim Gan Math
Sign up free

A two-way eyesight table

A two-way eyesight table

Secondary 2
3 marks
TGM Original Questions

Each object in the stated selection population is equally likely to be selected.

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

Solution:

Solution locked

680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs a course plan.

Create free accountSign inGet the E Math course · from S$29.98/moE Math tuition

Create a free account to practise similar questions.

Create free accountSign inGet the E Math course · from S$29.98/moE Math tuition
Answer:(i) \(\frac{1}{2}\) (ii) \(\frac{7}{20}\) (iii) \(\frac{17}{20}\).

Need help? Join our E-Maths tuition for O-Level success.

Learn more