Problema Solution
In a zoo, the ratio of adults to children is 3 to 9. If there are 60 people in the zoo, how many children are there?
Answer provided by our tutors
let
a = the number of adults
c = the number of children
the ratio of adults to children is 3 to 9
a : c = 3 : 9 cross multiply
9a = 3c
there are 60 people in the zoo:
a + c = 60
by solving the system of equations:
9a = 3c
a + c = 60
we find:
a = 15 adults
c = 45 children
click here to see the step by step solution of the system of equations:
there are 45 children in the zoo.