Probability Diagrams & Multiple Events (Cambridge (CIE) IGCSE International Maths: Core): Exam Questions

The table gives some information about the numbers of visitors at a leisure centre one day.

i) Complete the table.

[1]

ii) Work out how many more child visitors than adult visitors there are.

[1]

iii) Write down the fraction of visitors that are adults. Give your answer in its lowest terms.

[2]

iv) Write the ratio number of males : number of females. Give your answer in its simplest form.

..................... : ................... [2]

v) One of these visitors is selected at random. Find the probability that this visitor is a male child.

[1]

 = { : is a positive integer less than 20}
A = { : is an even number}
B = { : is a multiple of 3}

One of these 19 numbers is picked at random.

Work out the probability that this number is

i) not in set and not in set ,

[1]

ii) in

[1]

A bag contains 15 red beads and 10 yellow beads.
Ariana picks a bead at random, records its colour and replaces it in the bag.
She then picks another bead at random.

Find the probability that she picks two red beads.

Find the probability that she does not pick two red beads.

The numbers from to  are shown in the Venn diagram.

i) List the members of the set

[1]

ii) List the members of the set  

[1]

A number is picked at random from the numbers in the Venn diagram.

Find the probability that this number is in set but is not in set .

On any Saturday, the probability that Arun plays football is 

On any Saturday, the probability that Bob plays football is 

Complete the tree diagram.

Calculate the probability that, one Saturday, Arun and Bob both play football.

Calculate the probability that, one Saturday, either Arun plays football or Bob plays football, but not both.

 = { : is a natural number 15}

= { : is a factor of 12}

= { : is an odd number}

i) Complete the Venn diagram to show the elements of these sets.

[2]

ii) A number is chosen at random from .

Work out the probability that this number is in set .

[1]

= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}
= {: is a factor of 14}
= {: is a prime number less than 14}

i) Write down the elements in set .

= { ................................................ } [2]

ii) Write down the elements in set .

= { ................................................ } [2]

iii) Complete the Venn diagram.

[2]

 iv) A number is chosen at random from the universal set .

Write down the probability that the number is in the set  .

[2]

The 262 students at a college each study one of the languages shown in the table.

Complete the table.

[3]

Find the probability that

i) a girl, chosen at random, studies Spanish,

[1]

ii)a boy, chosen at random, studies French or Italian,

[1]

iii)a student, chosen at random, does not study German.

[1]