SOLUTION: A math teacher gave her students two tests. On the first test, 64% of the class passed the test, but only 40% of the class passed both tests. What is the probability that a stud

Algebra ->  Probability-and-statistics -> SOLUTION: A math teacher gave her students two tests. On the first test, 64% of the class passed the test, but only 40% of the class passed both tests. What is the probability that a stud      Log On


   

Question 1131030: A math teacher gave her students two tests. On the first test, 64% of the class passed the test, but only 40% of the class passed both tests.
What is the probability that a student passes the second test, given that they passed the first one?

Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
.
The problem asks for the ratio of the number of those who passed both exams to the number of those who passed the first exam.


This ratio is  40%2F64 = 5%2F8.     ANSWER