Three pen colours from given probabilities

Three pen colours from given probabilities

Secondary 2
TGM Original Questions

A bag contains black, red and green pens. The probability of green is 15% and the probability of black is 0.55.

  1. Find the probability of not green.
  2. Find the probability of red.
  3. If there are 18 red pens, find the total number of pens.

Solution:

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Answer:(a) \(0.85\); (b) \(0.30\); (c) \(60\).

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