In a company, it's known that $45 \%$ of the employees have a graduate (university), a half are not graduate and make less than $\$1500$ per month.Those who are graduate, $\frac{2}{9}$ make less than $\$1500$
What is the probability of one employee not be graduate, knowing that makes more or equal than $\$1500?
Fist I set two events:
A - "To be graduate"
B$ - "To make less than $\$1500$"
I know that the question is about $P(\bar{A}|\bar{B})$.From the introdution I know that:
$P(A)=0{,}45$
$P(\bar{A}\cap B)=0{,}5$
$P(B|A)=\frac{2}{9}$
But I don't know how to find the probability asked.Can you explain me how to do it?