Properties on an eight-sector spinner

Properties on an eight-sector spinner

Secondary 2
7 marks
TGM Original Questions

A fair spinner has equal sectors labelled 5, 8, 12, 3, 16, 9, 14 and 1. Find the probability that the selected label is

  1. odd,[1]
  2. prime,[1]
  3. a perfect square,[1]
  4. a multiple of 4,[1]
  5. at least 10,[2]
  6. a perfect square or a multiple of 4.[1]

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Answer:(i) \(\frac{1}{2}\) (ii) \(\frac{1}{4}\) (iii) \(\frac{3}{8}\) (iv) \(\frac{3}{8}\) (v) \(\frac{3}{8}\) (vi) \(\frac{5}{8}\).

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