Here's the q': In a recent survey amongst college students, it was found that 40% were graduates of public schools.

Here's the q': In a recent survey amongst college students, it was found that 40% were graduates of public schools. The survey revealed that 20% of college students are maintaining a GPA of at least 2.5. A student is selected at random and found to have a GPA of less than 2.5, what is the probability that the student is from a private school?