Real GDP per person in Country X is $10,000, and the growth rate is 10 percent a year. Real GDP per person in Country Y is $20,000 and the growth rate is 5 percent a year. When will real GDP per person be greater in X than in Y?

Select one:

a. in 10 years

b. in 2 years

c. in 7 years

d. in 15 years

e. never