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WAEC 2019 · Paper 1 · Q45

A box contains 5 red, 6 green and 7 yellow pencils of the same size. What is the probability of picking a green pencil at random?

Worked solution (try it first)
  1. There are 5+6+7=185 + 6 + 7 = 18 pencils.
  2. 6 of them are green, so the probability is 618=13\frac{6}{18} = \frac13, option C.

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