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?

Question

A.
50%
B.
1%
C.
100%
D.
10%

Answer 1

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}.