Suppose that the amounts that students at a college spend on textbooks this semester have a normal curve with mean μ = $360 and standard deviation σ = $120.
a. What is the probability that a randomly selected student spends less than $450 on textbooks this semester?
b. What is the probability that a randomly selected student spends more than $240 on textbooks this semester?
c. What is the probability that a randomly selected student spends between $240 and $450 on textbooks this semester?