Three-colour marble probabilities

Three-colour marble probabilities

Secondary 2
TGM Original Questions

A bag contains 40 blue, yellow and green marbles in total. The probabilities of drawing blue and yellow are \(3/8\) and \(7/20\), respectively. Find

  1. the number of yellow marbles,
  2. the probability of drawing green.

Solution:

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Answer:(a) \(14\); (b) \(11/40\).

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