Question

PROBLEM 05: There are 540 students at a walk-in clinic, each of which has either the flu, a sinus infection, or bronchitis (no student has more than one of these illnesses). If the number of students with the flu is two times the number of students with bronchitis, and the number of students with a sinus infection is three times the number of students with the flu, how many of the 540 students have the flu? A) 60 B) 90 C) 180 D) 120 E) none of the above