Tree Diagrams
Maths: Edexcel IGCSE Higher, topic 6.3.6
Frequency Trees
We can often work out values in an incomplete frequency tree.
Incomplete frequency tree
Completing a frequency tree
- That means that there were 28 - 19 = 9 days when it didn’t rain.
Completing a frequency tree
- On those 9 days, Sandra didn’t miss the bus 7 days so she must have missed the bus on the remaining 9 - 7 = 2 days.
Completing a frequency tree
- Of the 19 days when it did rain, Sandra didn’t miss the bus on 3 days so she must have missed the bus on the remaining 19 - 3 = 16 days.
Test yourself on Tree Diagrams
What does this frequency table suggest about the dice used?
What does this frequency table suggest about the dice used?
What does this frequency table suggest about the dice used?
What does this frequency table suggest about the dice used?
What is x equal to if there were 40 trials?