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Combinatorics Problem from Manhattan

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sumi747
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Combinatorics Problem from Manhattan [#permalink] New post   13 Apr 2019, 03:04
00:00
A
B
C
D
E

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:
a-mother-bird-has-6-babies-everytime-she-returns-to-the-nest-she-feed-101011.html?style=12#p781653
Didn't find the previous explanations as helpful

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Re: Combinatorics Problem from Manhattan [#permalink] New post   13 Apr 2019, 03:05
Bunuel IanStewart SajjadAhmad

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Re: Combinatorics Problem from Manhattan [#permalink] New post   13 Apr 2019, 06:46
sumi747 wrote:
Bunuel IanStewart SajjadAhmad

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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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Re: Combinatorics Problem from Manhattan [#permalink] New post   13 Apr 2019, 09:49
Expert Reply
sumi747 wrote:
Combinatorics
Can the experts explain this problem:
a-mother-bird-has-6-babies-everytime-she-returns-to-the-nest-she-feed-101011.html?style=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.

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Re: Combinatorics Problem from Manhattan [#permalink]
13 Apr 2019, 09:49
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