Problema Solution
a university has 40 professors of biology, chemistry, and physics. there are twice as many chemistry professors as physics professors. there are four fewer biology professors than physics professors. determine the number of each type of professor.
Answer provided by our tutors
let 'c' represent the number of chemistry professors, then 'c/2' represents the number of physics professors, '(c/2)-4' represents the number of biology professors
40 = c + (c/2) + (c/2)-4
solving for 'c' we have c=22
22/2 = 11
11 - 4 = 7
there are 7 biology, 11 physics and 22 chemistry professors