It is currently 16 Dec 2018, 05:22

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Sherry supervises a crew of maintenance engineers for an off

Author Message
TAGS:
GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1663 [0], given: 396

Sherry supervises a crew of maintenance engineers for an off [#permalink]  30 Dec 2017, 14:11
Expert's post
00:00

Question Stats:

100% (01:59) correct 0% (00:00) wrong based on 4 sessions
Sherry supervises a crew of maintenance engineers for an office building. If there are 5 experienced maintenance engineers and 3 apprentice engineers and the engineers are sent out on jobs in teams, which of the following must be true?

Indicate all possible values.

A. There are 10 different 3-person teams of experienced engineers she could send.
B. There are 3 different 2-person teams of apprentice engineers she could send.
C. There are 2 different 2-person teams of apprentice engineers she could send.
D. There are 10 different 2-person teams of experienced engineers she could send.
E. There are 10 different 4-person teams of experienced engineers she could send.

Drill 2
Question: 11
Page: 564-565

[Reveal] Spoiler: OA
A, B, D

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1663 [0], given: 396

Re: Sherry supervises a crew of maintenance engineers for an off [#permalink]  12 Jan 2018, 15:33
Expert's post
Explanation

Starting with choice (A), there are 3 slots on the team, with 5 experienced engineers available for the first slot, 4 for the second slot, and 3 for the third slot. Order doesn’t matter, so divide by 3! to get $$\frac{5 \times 4 \times 3}{3 \times 2 \times 1}= 10$$. Choice (A) is correct.

For choice (B), you have 3 apprentice engineers available for 2 slots and once again, order doesn’t matter. $$\frac{3 \times 2}{2 \times 1}= 3$$. Choice (B) is correct and you can eliminate choice (C), which contradicts choice (B).

For choice (D) you have $$\frac{5 \times 4}{1 \times 2}= 10$$, so choice (D) is correct.

Choice (E) is incorrect because $$\frac{5 \times 4 \times 3 \times 2}{4 \times 3 \times 2 \times 1}= 5$$. The correct answers are choices (A), (B), and (D).
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: Sherry supervises a crew of maintenance engineers for an off   [#permalink] 12 Jan 2018, 15:33
Display posts from previous: Sort by