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Re: To serve as team coach, 1 person is to be selected from amon [#permalink]
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Great explanation
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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!
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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
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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).

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