Gce Model Questions Vol1 2025 Mathematics Question 18
Practice objective / multiple choice question 18 from the 2025 Gce Model Questions Vol1 Mathematics examination.
A bag contains red, blue and green balls. The numbers of red and blue balls are 5 and 4 respectively, while the number of green balls is unknown. A ball is drawn at random, its colour noted, and the ball is replaced. The experiment is repeated once more. It is known that the probability that the two drawn balls are of the same colour is exactly \(\frac{25}{72}\). (a) Determine the number of green balls in the bag. (b) Using this number, find the probability that at least one of the two drawn balls is red.
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About This Question
This is Gce Model Questions Vol1 2025 Mathematics Question 18. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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