Enterprise Bank currently requires customers with checking accounts to maintain a minimum balance or pay a monthly fee. Enterprise plans to offer accounts with no monthly fee and no minimum-balance requirement; to cover their projected administrative costs of $3 per account per month they plan to charge $30 for overdrawing an account. Since each month on average slightly more than 10 percent of Enterprise's customers overdraw their accounts, bank officials predict the new accounts will generate a profit.
Which of the following, if true, most strongly supports the bank officials’ prediction?
A. Some of Enterprise Bank's current checking account customers are expected to switch to the new accounts once they are offered.
B. One third of Enterprise Bank's revenues are currently derived from monthly fees tied to checking accounts.
C. Many checking account customers who occasionally pay a fee for not maintaining a minimum balance in their account generally maintain a balance well above the minimum.
D. Customers whose checking accounts do not have a minimum-balance requirement are more likely than others to overdraw their checking accounts.
E. Customers whose checking accounts do not have a minimum-balance requirement are more likely than others to write checks for small amounts.
AnalysisBID (Boil It Down): $30 overdraft rev -> Profit (over $3 expenses)
Big 3 GMAT Assumptions:1. Success (The prediction is likely to be true/happen) - The overdraft fees WILL cover the admin expenses
2. Relevance - N/A
3. No Other Factors - N/A
The Goal: We need to find the option that helps to support the notion that the overdraft fees will be sufficient to cover the admin expenses. This will likely be done by ruling out a compelling reason why the plan wouldn’t work.
Formal Argument Analysis:Conclusion: The new accounts, which require no minimum balance and have no monthly fee, will generate a profit.
Evidence: Slightly more than 10% of Enterprise’s customers overdraw their accounts, and they will be charged $30 when this happens. This will more than compensate for the $3/per account administrative costs.
Assumption: The people who choose the new, no-fee accounts will overdraw in sufficient numbers to raise enough money to offset the administrative costs.
Understanding the situation through a little Test It:Let’s say we’re talking about 100 of the new free accounts
Expenses$3 admin fee x 100 accounts:
$300/month in admin expensesOverdraft Fee RevenueNumber of overdraft accounts:10% of 100 accounts =
10 accounts/monthRevenue:
10 accounts x $30 fee =
$300/month in overdraft fee revenueChoice D is correct, and is really compelling that the bank officials are correct. If it’s true that bank customers most likely to overdraw are those who open the new free accounts this tells us that there could be an even greater potential (beyond 10%) to generate the $30 overdraft fees thus helping to make these new free accounts profitable.
If that were true, check out our math above. If more than 10 accounts/month out of 100 overdraft, then the revenue is likely to exceed the $300/month in expenses.Choice A only tells us that “some” customers will switch to the new account, but how many? In any case, this choice does not tell us whether the new accounts will be profitable.
Choice B only tells us about the older account type. This is not relevant to the discussion of the new account’s profitability.
Choice C is wholly irrelevant to the discussion of the new account type because it is not clear how the behavior of holders of the current type of checking accounts will compare to those who open the new type of checking accounts. This is a great example of one of the biggest opportunities on the GMAT. Remember that you will be greatly rewarded by the test-writers if you can detect when options shift away from the subject discussed in the conclusion.
Choice E doesn’t affect the argument in a definite way. If anything, the small checks imply that the accounts will NOT be overdrawn, which would weaken the argument, but of course the accounts could still be overdrawn.The Big Picture1. Detecting shifts in subject: here we’re greatly rewarded by paying very careful attention to the whether an option is referring to the current account type, or the new type. The test-writers LOVE to see who’s paying attention. By knowing to look out for these subject shifts, you’ll come out with a bigger score.
2. Investing some time to understand the prompt & situation - We never want to move into our option evaluation until we feel we’ve gained a confident understanding of the prompt. Because this question involves numbers and basic math, it’s helpful to get a sense of the numbers by Testing an easy to calculate scenario