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Maths•SHS Core: Trigonometry, Statistics & Probability

Statistics & probability

Senior High 6 questions
AI-drafted from platform data — specialist review scheduledBy DigiTransact Mastermind editorial teamLast updated
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What statistics & probability means

You practise reading data and choosing the right summary measure for a set of numbers. This helps you compare scores, spot the centre of a list, and judge simple chance questions with confidence.

What you will practise

  • Add a list of numbers and divide by the count.
  • Pick the middle value after arranging numbers in order.
  • Identify the value that appears most often.
  • Work out simple probability from favourable and total outcomes.

Before you start

You should be comfortable with basic addition, division, and ordering numbers from smallest to largest. It also helps to know simple fractions and how to count outcomes.

Not confident yet? Work through Trigonometry first.

Worked example

One question from this skill's own question bank, shown with its full working.

Question

Find the mean of 4, 6, 8, 10, 12.

  • 6
  • 8
  • 10
  • 12
Answer: 8

Working: Mean = (4+6+8+10+12) ÷ 5 = 40 ÷ 5 = 8.

Common mistakes to avoid

  • Forgetting to arrange the numbers before finding the median.
  • Using the middle two values as the median when there is an odd count.
  • Adding values correctly but dividing by the wrong number of items.
  • Counting repeated values wrongly when deciding the most common number.

Curriculum and exam alignment

Ghana GES SHS syllabusWASSCE

This topic normally appears in SHS lessons on statistics and probability, usually after learners can handle basic number operations. In WASSCE preparation, it supports questions on averages, data interpretation, and simple chance.

Curriculum notes are a general guide to where this work normally sits. Always check the syllabus your school or examination body is currently using.

Related skills

Other SHS Core: Trigonometry, Statistics & Probability skills in Maths, at the same point in the course.

Other Maths topics

Picture Addition & SubtractionEarly NumeracyNumber BasicsSHS Core MathematicsUniversity MathematicsAlgebra

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Exams that assess statistics & probability

Senior High work on this skill feeds directly into these exam papers. Each page lists the Maths topics that appear on it.

WASSCEWASSCE practice questionsFree WASSCE practice across the subjects at this stage, with worked answers.GESGES practice questionsFree GES practice across the subjects at this stage, with worked answers.BECEBECE practice questionsListed as a related subject on the BECE practice page.

How this page was produced

This text was drafted with AI assistance from the questions and topics already stored on the platform. A subject-specialist review is scheduled but has not yet been recorded, so we do not claim it here.

Written by
DigiTransact Mastermind editorial team
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Practise statistics & probability

6 questions with a worked answer after every attempt, and a SmartScore that tracks how close you are to mastery.

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