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Learning objective

Compute the expected value of a variable based on a probability distribution and address problems related to expectation.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE StatisticsProbability distributions

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Quick explanation

Compute the expected value of a variable based on a probability distribution and address problems related to expectation

  • This point belongs to Probability distributions, especially Probability distributions outcomes.
  • You need to be able to compute the expected value of a variable based on a probability distribution and address problems related to expectation.
  • The key ideas to know are Calculate, Determine, and Explain.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

CalculateDetermineExplain

Why it matters

This objective helps connect Probability distributions outcomes to exam-style questions, flashcards, and revision notes for Probability distributions.

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Practice Questions7 linked questions

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Paper 1 structured question: Probability distributions

Paper 1Statistical Techniques3 marks

Description

Game Winnings

Possible winnings and their probabilities based on a fair six-sided die:

Winnings (£)Probability
101/6
52/6
03/6
  1. a

    Calculate the expected winnings from playing the game once.

    Aim for approximately 3 distinct marking points.

    [3]
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