Three-colour marble probabilities
Three-colour marble probabilities
Secondary 2
2 marks
TGM Original Questions
A bag contains 40 blue, yellow and green marbles in total. The probabilities of drawing blue and yellow are \(\frac{3}{8}\) and \(\frac{7}{20}\), respectively. One marble is selected at random. Find
- the number of yellow marbles,[1]
- the probability of drawing green.[1]
Solution:
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Answer:(a) \(14\) (b) \(\frac{11}{40}\).
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