Question 10 • 25-26 CRX Math Models with Applications 7052A
Sandy is trying to reconstruct her spending pattern from July. She knows that she had $277 in her account on July 1, but after that, her receipts and balance statements are all scrambled. Here are Sandy’s records:DateTransaction TypeAmount ($)7/26Purchase867/25Deposit767/4Purchase1377/6Deposit907/10Purchase1317/9Purchase1457/15Deposit1527/19Purchase137Assuming that this is a complete, if scrambled, record of Sandy’s July spending and that any overdraft fees incurred do not affect the running total, how many times did Sandy overdraw her account in July?
Answer
A
Sandy never overdrew her account.
B
Sandy only overdrew her account once.
C
Sandy overdrew her account twice.
D
Sandy overdrew her account more than twice.
Explanation
Put the transactions in date order, starting with $277. After the July 9 purchase, Sandy has $85; the July 10 purchase of $131 puts her at −$46, her first overdraft. The July 15 deposit brings her to $106, but the July 19 purchase of $137 puts her at −$31, and the July 26 purchase of $86 leaves her at −$41. She overdrew more than twice, so the correct choice is “Sandy overdrew her account more than twice.”
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