Official Guide Explanation:
Data Sufficiency #97




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Solution and Metadata

Question: 97
Page: 160
Difficulty: 4 (Moderately Easy)
Category 1: Algebra > Linear Equations-Two Unk >
Category 2: Word Problems > Other >

Explanation: You are given three variables and one equation: A + L + T = 36. To answer the question, you need two more distinct equations involving at least one of those variables.

Statement (1) is sufficient: T = 2L and T = (1/3)A. No need to solve for the variables, but with three distinct equations, you know you could. Statement (2) is not sufficient, as it provides only one more equation: T + L = (1/2)A. Choice (A) is correct.

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