Probability: theoretical probability — KCSE Mathematics
KCSE Mathematics · 99 practice questions · 3 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Define the sample space, event and probability; calculate P(E) = n(favourable outcomes)/n(sample space) for equally likely outcomes
Apply the complementary rule P(E') = 1 – P(E) and identify mutually exclusive and independent events
Probability: theoretical probability
Sample Questions
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State whether the events of flipping a coin and rolling a die are independent. Justify your answer. (3 marks)
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State the probability of not rolling a six when a fair die is thrown once. (2 marks)
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A spinner is divided into 8 equal sections numbered from 1 to 8. (a) Describe the sample space when the spinner is spun once. (2 marks) (b) Find the probability of landing on an even number. (2 marks)
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A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. (a) State the sample space when one marble is drawn. (2 marks) (b) Calculate the probability of drawing a blue marble. (2 marks)
Why Practise Probability: theoretical probability?
KNEC Aligned
Questions match the KCSE syllabus objectives and exam format exactly.
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