the tree diagram below shows the distribution of cars sold and whether each type got upgrades of not. find the probability of a random car getting an upgrade.
To find the probability of a random car getting an upgrade, we need to calculate the total number of cars that got an upgrade and divide it by the total number of cars sold.
Looking at the tree diagram, we can see that there are 90 cars in total, and 40 of them got upgrades.
Probability of a random car getting an upgrade = Number of cars that got an upgrade / Total number of cars
Probability of upgrade = 40/90
Probability of upgrade = 4/9
Therefore, the probability of a random car getting an upgrade is 4/9 or approximately 0.4444.