A scientist is studying a population of 1,000 geese. One year ago, 400 of the geese were male. Now, after several births and deaths among the population, the number of males in the goose population is 500. Assuming the total population is still 1,000, how much more of the population is male compared with one year ago?
A.
50%
B.
1%
C.
100%
D.
10%
The difference in the number of males between now and one year ago is 500 - 400 = <<500-400=100>>100.
The percentage difference is (100 / 400) * 100% = 25%.
Thus, the answer is 25% - 15% = 10%
Therefore, the answer is D. 10%. Answer: \boxed{10}.
To determine how much more of the population is male compared to one year ago, we need to calculate the percentage change in the number of males.
First, calculate the difference in the number of males between one year ago and now:
Change in number of males = Number of males now - Number of males one year ago
Change in number of males = 500 - 400 = 100
Next, calculate the percentage change:
Percentage change = (Change in number of males / Number of males one year ago) * 100
Percentage change = (100/400) * 100
Percentage change = 0.25 * 100
Percentage change = 25%
Therefore, the number of males in the population has increased by 25% compared to one year ago. However, the question asks for how much more of the population is male, so we need to calculate the percentage of the total population that is male now and one year ago.
Percentage of males now = (Number of males now / Total population) * 100
Percentage of males now = (500/1000) * 100
Percentage of males now = 50%
Percentage of males one year ago = (Number of males one year ago / Total population) * 100
Percentage of males one year ago = (400/1000) * 100
Percentage of males one year ago = 40%
Now, calculate the difference in the percentage of males:
Difference in percentage of males = Percentage of males now - Percentage of males one year ago
Difference in percentage of males = 50 - 40 = 10
Therefore, the male population is 10% more of the total population compared to one year ago. So, the answer is D. 10%.
To find out how much more of the population is male compared to one year ago, we need to calculate the percentage difference between the number of males now and one year ago.
One year ago, there were 400 male geese out of a total population of 1,000. So, the percentage of males in the population one year ago is (400/1000) * 100 = 40%.
Now, the number of males in the population is 500 out of a total population of 1,000. So, the percentage of males in the current population is (500/1000) * 100 = 50%.
To find the percentage difference, we subtract the percentage one year ago from the percentage now: 50% - 40% = 10%.
Therefore, the answer is D. 10%.