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4MA1/1F Jan 2021, Question 2: Basic Probability

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

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The question, in short

Sandeep designs three-sided spinners, each spun once. Fill dotted lines with different numbers to meet given conditions, and mark a probability on a scale.

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

Part (ai) · 1 mark

Choose three different numbers for the spinner so that landing on a value above 9 cannot happen.

  1. 1Choose three different numbers.
  2. 2Each number must be ≤ 9.
  3. 3Write them on the spinner: e.g. 1, 2, 3.

Answere.g. 1, 2, 3

Part (aii) · 1 mark

Choose three different numbers so that landing on a multiple of 10 is guaranteed.

  1. 1Choose three different multiples of 10.
  2. 2Such as 10, 20, 30.
  3. 3Write them on the spinner: e.g. 10, 20, 30.

Answere.g. 10, 20, 30

Part (b) · 1 mark

Place a cross on the 0 to 1 probability scale to show an outcome with even chance.

  1. 1The probability of an evens outcome is 0.5.
  2. 2Locate 0.5 on the probability scale.
  3. 3Mark with a cross (X) at 0.5.

AnswerA cross at 0.5

Stuck on a step? Read the free lesson: Basic Probability

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