MathRevolution wrote:

[GMAT math practice question] 11.17

27 percent of the students at a certain school are boys who are enrolled in an advanced math class. If 40 percent of the boys at the school are enrolled in the advanced math class, what percentage of all students at the school

are boys?

A. 25%

B. 30%

C. 35%

D. 40%

E. 45%

Hi..

answer is not in choices..

let total be t and boys be b..

**Quote:**

27 percent of the students at a certain school are boys who are enrolled in an advanced math class = 40 percent of the boys at the school are enrolled in the advanced math class

\(\frac{27t}{100}=\frac{40b}{100}........\frac{b}{t}=\frac{27}{40}\)

so in % = \(\frac{27}{40}*100=67.5%\)

The percentage of the boys enrolled in the advanced math class is fixed to 60%.