Derek's cell phone bill shows total minutes used for each of two categories: peak minutes and off...

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Source: Princeton Review

Derek's cell phone bill shows total minutes used for each of two categories: peak minutes and off-peak minutes. If Derek used a total of 75 minutes last month, how many off-peak minutes did he use?

1) Derek used twice as many off-peak minutes as peak minutes last month.
2) Last month, Derek exceeded his allowance of off-peak minutes by 25 percent.

The OA is A
Source: — Data Sufficiency |