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# Paul is able to grade p essays every half hour, and Sarah is

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GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
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Kudos [?]: 1782 [0], given: 397

Paul is able to grade p essays every half hour, and Sarah is [#permalink]  09 Dec 2017, 19:27
Expert's post
00:00

Question Stats:

83% (00:40) correct 16% (02:49) wrong based on 6 sessions
Paul is able to grade p essays every half hour, and Sarah is able to grade s essays every hour. If Paul and Sarah work together grading essays for h hours, then in terms of p, s, and h, how many essays will they grade?

Indicate all such amounts.

A. $$\frac{p+s}{h}$$
B. $$\frac{2p+s}{h}$$
C. $$h(p + s)$$
D. $$2h(p + s)$$
E. $$h(2p + s)$$
F. $$h(p + 2s)$$
G. $$2hp + hs$$

[Reveal] Spoiler: OA
E, G

Drill 4
Question: 5
Page: 531-532

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Sandy
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GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 105

Kudos [?]: 1782 [0], given: 397

Re: Paul is able to grade p essays every half hour, and Sarah is [#permalink]  29 Dec 2017, 16:34
Expert's post
Explanation

Plug in numbers for p, s, and h, such as 2, 3, and 4, respectively. If Paul can grade 2 essays every half hour, then in 4 hours, he will grade 16 essays. If Sarah can grade 3 essays every hour, then in 4 hours, she will grade 12 essays.

Thus, Paul and Sarah will grade a total of 28 essays. Now, plug your numbers into each answer choice. Choices (E) and (G) result in 28. If you Plugged In and choice (F) also worked, you picked the same number for Paul and Sarah. If you picked choice (C), you didn’t notice that Paul grades p essays every half hour, not every hour.
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Sandy
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Re: Paul is able to grade p essays every half hour, and Sarah is   [#permalink] 29 Dec 2017, 16:34
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