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Edexcel IGCSE Math A 6.3 Probability Question Bank

Practise probability language, scales, event lists, Venn diagrams and calculations using fractions, decimals and complements.

Syllabus
First assessment 2018
Course
Math A 4MA1
Level
Higher

Exam points

  • interpret probability words, scales and impossible or certain outcomes from simple contexts
  • calculate probabilities from counters, spinners, tables, Venn diagrams and sample spaces
  • use complements or totals to find missing probabilities, frequencies or region values

Covered syllabus points

6.3.A Probability terminology6.3.B The probability scale6.3.C Theoretical probability6.3.D Probabilities from a Venn diagram6.3.E Sample spaces and events6.3.F Systematic outcome lists for successive events6.3.G Probabilities from previously collected data6.3.H Complementary events6.3.I The addition rule of probability for mutually exclusive6.3.J Expected frequency6.3.HA Tree diagrams6.3.HB The probability that two or more independent events6.3.HC Simple conditional probability when combining events6.3.HD Probability to simple problems

6.3 Probability question 1

[Maximum number: 4]

A biased spinner has three sections each of a different colour.
The table shows the probability that, when the spinner is spun once, it will land on blue or on orange or on white.

Table for Question 6.3 Probability question 1 — Edexcel IGCSE Math A Higher

Question (a)

(a)

Work out the value of x

x=

The spinner is spun 250 times.

[ 2 ]

Question (b)

(b)

Work out an estimate for the number of times the spinner will land on blue.

[ 2 ]

6.3 Probability question 2

[Maximum number: 5]

Grace is going to spin the arrow on the spinner once.

The table below gives the probabilities that the spinner will land on red or on blue or on green.
The probability that the spinner will land on orange is 3 times the probability that the spinner will land on pink.

Figure for Question 6.3 Probability question 2 — Edexcel IGCSE Math A Higher
Table for Question 6.3 Probability question 2 — Edexcel IGCSE Math A Higher

Question (a)

(a)

Work out the probability that the spinner will land on orange.

[ 3 ]

Question (b)

(b)

Grace spins the arrow on the spinner 150 times.

Work out an estimate for the number of times the spinner lands on blue.

[ 2 ]

6.3 Probability question 3

[Maximum number: 2]

100 farmers are asked if they have goats (G), sheep (S) or chickens (C) on their farms.
Of these farmers
31 have sheep
53 have chickens
6 have goats, sheep and chickens
11 have sheep and goats
17 have sheep and chickens
18 have goats and chickens
20 do not have any goats, sheep or chickens

Find the probability that this farmer also has goats.

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