Problema Solution
Bella surveyed her classmates in musical class. the ratio students prefer playing string instruments to those who prefer wind instruments is 2 : 5. there are 28 students in Bellas class. how many students prefer playing string instruments
Answer provided by our tutors
let
w = the number of students that prefer wind instrument
s = the number of students that prefer string instrument
the ratio students prefer playing string instruments to those who prefer wind instruments is 2 : 5
s : w = 2 : 5 cross multiply
5s = 2w
there are 28 students in Bella's class
s + w = 28
by solving the system of equations
5s = 2w
s + w = 28
we find
s = 8 students
w = 20 students
click here to see the step by step solution of the system of equations
8 students prefer string instruments.