Official Guide Explanation:
Data Sufficiency #118

Background

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Solution and Metadata

Question: 118
Page: 283
Difficulty: 4 (Moderately Easy)
Category 1: Word Problems > Rate Problems > other

Explanation: To answer this question, you need a lot of information: the regular hourly rate, the number of hours worked beyond 40 hours, and the number of hours worked on Sunday. Statement (1) provides the regular hourly rate, but nothing else, so it is insufficient. Statement (2) gives total number of hours, but the information about the number of hours per day is irrelevant. Since there's nothing about dollars per hour, (2) is insufficient.

Taken together, there's still not enough information. Those 54 hours could come from 54 from Monday through Saturday, or could be a few hours on Sunday and the remainder from Monday to Saturday. Those two scenarios would result in different payment amounts for the week, so choice (E) is correct.

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