Waec Model Questions Vol1 2021 Mathematics Question 23
Practice objective / multiple choice question 23 from the 2021 Waec Model Questions Vol1 Mathematics examination.
In a box there are red, blue and green balls. The probability of drawing a green ball is 0.2. The probability of drawing a red ball is three times the probability of drawing a blue ball. Two balls are drawn successively without replacement. The probability that the two balls are of different colours is 0.7. How many green balls are in the box if the total number of balls is 5?
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About This Question
This is Waec Model Questions Vol1 2021 Mathematics Question 23. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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