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# M70-03

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Math Expert
Joined: 02 Sep 2009
Posts: 58453

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03 Sep 2018, 02:02
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Difficulty:

25% (medium)

Question Stats:

86% (00:34) correct 14% (01:21) wrong based on 7 sessions

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What is $$\frac{p + q + r}{4}$$?

(1) $$\frac{p + q + r}{7} = 18$$

(2) $$p + q = r + 4$$

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Math Expert
Joined: 02 Sep 2009
Posts: 58453

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03 Sep 2018, 02:02
Official Solution:

We’ll go for LOGICAL since logic is the first option in Data Sufficiency.

(1) If we know the value of $$\frac{p + q + r}{7} = 18$$, we can easily (by multiplying by 7 and dividing by 4) get the value of $$\frac{p + q + r}{4}$$. That’s enough information! (B), (C) and (E) are eliminated.

(2) Subtracting $$r$$ from both sides of the equation can only give us $$p + q – r$$. (D) is eliminated!

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Re M70-03   [#permalink] 03 Sep 2018, 02:02
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# M70-03

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