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The national average cost per student for books and supplies

The national average cost per student for books and supplies at four-year private colleges in 2011–2012 was $1,213. Assume the same average is true for the upcoming school year and these expenses are approximately normally distributed, with a standard deviation of $68.

a. What percentage of students will have expenses for books and supplies between $1100 and $1150?

b. What percentage of students will have expenses for books and supplies less than $1350?

c. If a student budgets $1250 for books and supplies, there’s a _____% probability that he/she will end up at least $50 short.

d. To ensure no more than a 1% chance of being short, a student should budget $_____ for books and supplies.

a. What percentage of students will have expenses for books and supplies between $1100 and $1150?

b. What percentage of students will have expenses for books and supplies less than $1350?

c. If a student budgets $1250 for books and supplies, there’s a _____% probability that he/she will end up at least $50 short.

d. To ensure no more than a 1% chance of being short, a student should budget $_____ for books and supplies.

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