Answer:
93% probability of a student taking a calculus class or a statistics class
Step-by-step explanation:
We solve this problem building the Venn's diagram of these probabilities.
I am going to say that:
A is the probability that a student takes a calculus class.
B is the probability that a student takes a statistics class.
We have that:
In which a is the probability that a student takes calculus but not statistics and is the probability that a student takes both these classes.
By the same logic, we have that:
The probability of taking a calculus class and a statistics class is 0.07
This means that
The probability of taking a statistics class is 0.90
This means that . So
The probability of a student taking a calculus class is 0.10
This means that
What is the probability of a student taking a calculus class or a statistics class
93% probability of a student taking a calculus class or a statistics class