Question

in a survey of a town, 56% of residents own a car, 21% of residents owns a truck, and 4% of residents own both a car and a truck. what is the conditional probability that a person who owns a car also owns a truck?

Answer 1

I think the answer is 15% I might be wrong tho... hehe...

Answer 2

define two events
`A=\{owns \; a\; car\},B=\{owns \; a\; truck\}`.

From the information given,

`image`

The conditional probability,

a person owns a truck given the person who owns a car is

`image`