Many situations in probability can be organised into Venn diagrams or two-way tables to determine the size of different groups and do calculations.
In their class 5 people play both football and tennis, 13 people in total play tennis, and 11 in total play football.
How many students only play football?
How many students play only one sport?
If a random student is chosen from the group, find the probability that the student only plays tennis.
In a study, some people were asked whether they were musicians or not. 25 responders said they were a musician, of which 10 were children. 25 children said they were not musicians, and 13 adults said they were not musicians.
How many people were in the study?
State the proportion of responders that are musicians.
State the proportion of adults that are musicians.
Many situations in probability can be organised into Venn diagrams or two-way tables to determine the size of different groups and do calculations.