Last visit was: 18 Nov 2024, 12:38 It is currently 18 Nov 2024, 12:38

Close

GRE Prep 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
Your Progress

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

Practice
Pays

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Verbal Expert
Joined: 18 Apr 2015
Posts: 29975
Own Kudos [?]: 36269 [8]
Given Kudos: 25915
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 29975
Own Kudos [?]: 36269 [0]
Given Kudos: 25915
Send PM
avatar
Intern
Intern
Joined: 08 Aug 2019
Posts: 28
Own Kudos [?]: 39 [4]
Given Kudos: 0
Location: United States
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 29975
Own Kudos [?]: 36269 [0]
Given Kudos: 25915
Send PM
Re: To serve as team coach, 1 person is to be selected from amon [#permalink]
Expert Reply
Great explanation
Manager
Manager
Joined: 01 Dec 2018
Posts: 87
Own Kudos [?]: 35 [0]
Given Kudos: 38
Send PM
Re: To serve as team coach, 1 person is to be selected from amon [#permalink]
Is there a strategy to know if its D instead of picking number?

The above explanation its amazong but when you are against time, its practically imposible to get to that numbers right away.

Kind regards!
avatar
Manager
Manager
Joined: 22 Jan 2020
Posts: 120
Own Kudos [?]: 239 [0]
Given Kudos: 10
Send PM
Re: To serve as team coach, 1 person is to be selected from amon [#permalink]
FCOCGALVAN wrote:
Is there a strategy to know if its D instead of picking number?

The above explanation its amazong but when you are against time, its practically imposible to get to that numbers right away.

Kind regards!



Let
Number of people in SetA=n
Number of people in SetB=m>=9

The question tells us that there are 5 times as many ways to pick a team as there are coaches.
Therefore

(m choose 9)=5n

when m=9
(9 choose 9)=5n
1=5n
n=1/5
m can't be 9 since n cannot be 1/5

when m=10
(10 choose 9)=5n
10=5n
n=2
therefore m>n: Choice B

when m=11
(11 choose 9)=5n
55=5n
n=11
therefore m=n: Choice C

We stop and Final Answer: D
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 5020
Own Kudos [?]: 74 [0]
Given Kudos: 0
Send PM
Re: To serve as team coach, 1 person is to be selected from amon [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Prep Club for GRE Bot
Re: To serve as team coach, 1 person is to be selected from amon [#permalink]
Moderators:
GRE Instructor
78 posts
GRE Forum Moderator
37 posts
Moderator
1111 posts
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne