Question

Suppose is a semester that 38% of students at a college failed mathematics, 27% failed physics, and

9% failed both. A student is selected at random.
a)If a student failed physics, what is the probability that he or she failed math?
b)If a student failed math, what is the probability he or she failed physics?
c) What is the probability that he or she failed math or physics?

Answer 1

=> 38% of students at a college failed mathematics
=> 27% failed physics, and=> 9% failed both. A student is selected at random.

a)If a student failed physics, what is the probability that he or she failed math?
=> 1/38
b)If a student failed math, what is the probability he or she failed physics?
=> 1/27
c) What is the probability that he or she failed math or physics?
=> 1/9