1) 60% of students are from the south. 60% of them passed the test.
30% are from the north, and 70% of them passed the test.
10% are foreign, and 90% of them passed the test.
If a randomly selected student passed the test, the probability that the student is foreign is_______.© BrainMass Inc. brainmass.com June 23, 2018, 7:49 pm ad1c9bdddf
let us suppose that we have 1000 students in the class. Then
600 are from the south and 360 of them passed the ...