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Exam-style practice

Probability distributions answer explanations

Review worked answers and explanations for Probability distributions. Aligned to Cambridge IGCSE Statistics.

Answer explanations

Question 1 of 4

Review the answer support, then move sideways through the set.

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.

    [2]
  2. b

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

    [3]