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ZIMSEC A-Level Statistics

6.3.2Probability with permutations and combinations; Bayes' theorem

Probability with permutations and combinations; Bayes' theorem in ZIMSEC A-Level Statistics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic20 practice questions1 lesson
Practise this topicAll Statistics topics

Overview

Form 6. Probabilities and conditional probabilities in contexts with permutations and combinations are practised in amaths.probability.events-rules and amaths.probability.conditional.

Learning objectives

What the syllabus expects you to be able to do.

  1. 6.3.2.1Form 6: calculate probabilities and conditional probabilities in contexts involving permutations and combinations.
  2. 6.3.2.2Form 6: state Bayes' theorem and use it to solve probability problems.

Lessons

  • Bayes' theorem

    45 min

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Sample question

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

Probability with permutations and combinations; Bayes' theorem: sample question

1 mark

A bakery in Gweru bakes 65% of its loaves in oven P and the rest in oven Q. 4% of loaves from oven P and 9% of loaves from oven Q are burnt. Find the probability that a loaf chosen at random is burnt.

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

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