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ZIMSEC O-Level Additional Mathematics

6.2.1.3Addition and product rules

Addition and product rules in ZIMSEC O-Level Additional Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic22 practice questions1 lesson
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Learning objectives

What the syllabus expects you to be able to do.

  1. 6.2.1.3.1Form 4: apply the addition rule for mutually exclusive events and the product rule for independent events.
  2. 6.2.1.3.2Form 4: calculate probabilities using outcome tables and tree diagrams.

Lessons

  • Addition and product rules, outcome tables and tree diagrams

    45 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Addition and product rules: sample question

1 mark

At a clinic, the probability that the next patient is seen by Dr Moyo is 0.28 and the probability that the patient is seen by Dr Ncube is 0.37. A patient is seen by only one doctor. Find the probability that the next patient is seen by Dr Moyo or Dr Ncube.

Only if the answer has a unit, e.g. cm or km/h.

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