Official Guide Explanation:
Data Sufficiency #163




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Solution and Metadata

Question: 163
Page: 287
Difficulty: 6 (Moderately Difficult)
Category 1: Word Problems > Other >
Category 2: Arithmetic > Ratio and Proportion >

Explanation: If p is proportional to e and e is proportional to i, then p is also proportional to i. To find the value of p if i = 70 , you need the ratio of p to i, or the ratios of p and e and e to i.

Statement (1) is insufficient: while it provides the relationship between e and i, it doesn't provide the ratio of p to e. Statement (2) is sufficient, providing the ratio of p to i. With that ratio and the value of i, you can find the value of p. Choice (B) is correct.

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