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Cambridge IGCSE Statistics practice

Paper 1 structured question: Probability distributions

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Probability distributions

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Paper 1Statistical Techniques5 marks

A spinner is divided into 3 equal sections labelled A, B, and C.

Description

Spinner Outcomes

A spinner is divided into 3 equal sections labelled A, B, and C. The spinner is spun once.

Outcome
A
B
C
  1. a

    Calculate the probability of landing on section B.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    Show the probability distribution for the spinner outcomes.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 1 structured question: Probability distributions

Paper 1Statistical Techniques5 marks

Description

Marble Draw

A bag contains 5 green, 3 yellow, and 2 red marbles. One marble is drawn at random.

ColourNumber of marbles
Green5
Yellow3
Red2
  1. a

    Calculate the probability of drawing a yellow marble.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    Determine the probability distribution for the colour of the marble drawn.

    Aim for approximately 3 distinct marking points.

    [3]