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The birthrate of a certain species is approximately 500 organisms per

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Math Expert
Joined: 02 Sep 2009
Posts: 58429
The birthrate of a certain species is approximately 500 organisms per  [#permalink]

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18 Jan 2019, 01:09
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15% (low)

Question Stats:

80% (01:26) correct 20% (01:29) wrong based on 25 sessions

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The birthrate of a certain species is approximately 500 organisms per day. The death rate of the species is approximately 300 organisms per day. If the population has 50,000 organisms at the beginning of a certain year, approximately how many organisms will be in the population at the end of the year?

A 73,000
B 123,000
C 159,500
D 232,500
E 293,000

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The birthrate of a certain species is approximately 500 organisms per  [#permalink]

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Updated on: 19 Jan 2019, 03:08
Bunuel wrote:
The birthrate of a certain species is approximately 500 organisms per day. The death rate of the species is approximately 300 organisms per day. If the population has 50,000 organisms at the beginning of a certain year, approximately how many organisms will be in the population at the end of the year?

A 73,000
B 123,000
C 159,500
D 232,500
E 293,000

(500-300)* 365 = 73000 would ideally survive in a year ;
50,000+73000 = 123,000
IMO B

Originally posted by Archit3110 on 18 Jan 2019, 08:03.
Last edited by Archit3110 on 19 Jan 2019, 03:08, edited 1 time in total.
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Re: The birthrate of a certain species is approximately 500 organisms per  [#permalink]

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18 Jan 2019, 19:51
Think of it as humans. There is a birth rate (for babies), a death rate (for the entire population), and child mortality rate (for deaths of children).

This question provides information about birth rate and about death rate. The 300 deaths is for the entire population.
So, like humans, the population is increasing.

50000+365(500-300)=50,000+73,000=123,000
Re: The birthrate of a certain species is approximately 500 organisms per   [#permalink] 18 Jan 2019, 19:51
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