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# Combinatorics Problem from Manhattan

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Manager
Joined: 17 May 2018
Posts: 137
Location: India
Combinatorics Problem from Manhattan  [#permalink]

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13 Apr 2019, 03:04
00:00

Difficulty:

(N/A)

Question Stats:

50% (00:11) correct 50% (01:31) wrong based on 2 sessions

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Combinatorics
Can the experts explain this problem:
https://gmatclub.com/forum/a-mother-bir ... 12#p781653
Didn't find the previous explanations as helpful

Posted from my mobile device
Manager
Joined: 17 May 2018
Posts: 137
Location: India
Re: Combinatorics Problem from Manhattan  [#permalink]

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13 Apr 2019, 03:05

Posted from my mobile device
Intern
Joined: 04 Sep 2016
Posts: 49
Location: Germany
GPA: 3
Re: Combinatorics Problem from Manhattan  [#permalink]

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13 Apr 2019, 06:46
sumi747 wrote:

Posted from my mobile device

To pick all the combinations we have to do a 6C3 which is equal to 20

That means 20 combinations are there for everyone to get fed atleast once.

Each combination will have 3 birds. Total birds being fed 20*3 = 60

hence 60 * 5 = 120 which is 5 hours
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Math Expert
Joined: 02 Sep 2009
Posts: 55271
Re: Combinatorics Problem from Manhattan  [#permalink]

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13 Apr 2019, 09:49
sumi747 wrote:
Combinatorics
Can the experts explain this problem:
https://gmatclub.com/forum/a-mother-bir ... 12#p781653
Didn't find the previous explanations as helpful

Posted from my mobile device

Please do not re-post existing question. Please post your doubts/questions in existing threads. Thank you.

THIS TOPIC IS LOCKED AND ARCHIVED.
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Re: Combinatorics Problem from Manhattan   [#permalink] 13 Apr 2019, 09:49
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# Combinatorics Problem from Manhattan

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