(Solved): (a) What is the probability that a randomly selected student spends less than $418 on textbooks thi ...

(a) What is the probability that a randomly selected student spends less than $\$418$ on textbooks this semester? (b) What is the probability that a randomly selected student spends more than $\$165$ on textbooks this semester? (c) What is the probability that a randomly selected student spends between $\$165$ and $\$418$ on textbooks this semester?