Hard tree diagram word problem helpWatch this thread
- 60% of the children at school are boys
- 20% of the boys arrive at school by car
- 60% of the girls at school arrive by car
What is the probability a child chosen at random at school arrives by car?
So, for a the student to be a boy who arrives at school by car, you'd need to multiply the probability that the student is a boy with the probability that a boy arrives by car.
also you can choose a number for the total pupils....1000 is probably convenient ( it does not matter if it does not seem like a real world amount of pupils etc )