Question

One percent of the people of country X are taller than 6 ft. Two percent of the people of country Y are taller than 6 ft. There are thrice as many people in country X as in country Y. Taking both countries together, what is the percentage of people taller than 6 ft?

• A.
  3.0
• B.
  2.5
• C.
  1.5
• D.
  1.25

Answer 1

The correct option is D

1.25
Le the population of country Y is P

$\therefore$ Population of country X is 3P

% of people taken than 6 ft

$=\frac{\frac{3P\times 1}{100}+\frac{P\times 2}{100}}{3P+P}=1.25$