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4MA1/1F Jan 2021, Question 15: Basic Probability

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks

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The question, in short

A bag holds 30 counters in four colours with counts 7 red, 13 green, 4 yellow, 6 blue; one counter is picked at random. Find two probabilities.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

State the probability that the chosen counter is green.

  1. 1There are 13 green counters out of 30 total counters.
  2. 2Probability = 13 / 30

Answer13/30

Part (b) · 2 marks

State the probability that the chosen counter is not red.

  1. 1There are 7 red counters, so 30 − 7 = 23 counters that are not red.
  2. 2Probability = 23 / 30

Answer23/30

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