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GMAT 2016 quantitative- Q.69- I don't understand the answer

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GMAT 2016 quantitative- Q.69- I don't understand the answer [#permalink]

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New post 15 Sep 2017, 23:51
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Dear all,

I don't understand the logic of this question at all. The book says there are totally 120 surviving the first year but the answer only counts the hatched goose eggs. Why don't they count the 1/3 goose eggs that never got hatched?

I am looking forward for your helps. Thank you so much.
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Re: GMAT 2016 quantitative- Q.69- I don't understand the answer [#permalink]

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New post 16 Sep 2017, 01:44
Linh Vo wrote:
Dear all,

I don't understand the logic of this question at all. The book says there are totally 120 surviving the first year but the answer only counts the hatched goose eggs. Why don't they count the 1/3 goose eggs that never got hatched?

I am looking forward for your helps. Thank you so much.



Let total number of eggs laid=x
Hatched=2/3x
Survived 1st month=3/4*2x/3=x/2
Survived 1st year=x/2*2/5=x/5
Now x/5=120
x=600

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Re: GMAT 2016 quantitative- Q.69- I don't understand the answer [#permalink]

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New post 16 Sep 2017, 04:11
Linh Vo wrote:
Dear all,

I don't understand the logic of this question at all. The book says there are totally 120 surviving the first year but the answer only counts the hatched goose eggs. Why don't they count the 1/3 goose eggs that never got hatched?

I am looking forward for your helps. Thank you so much.


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Re: GMAT 2016 quantitative- Q.69- I don't understand the answer   [#permalink] 16 Sep 2017, 04:11
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