# The ratio of black walnut to red oak trees at a tree farm is 4:5. The tree farm has 1200 black walnut trees. How many black walnut and red oak trees does the tree farm have altogether?

##### 1 Answer

Dec 4, 2016

#### Explanation:

Let the common factor be

Hence the number of black walnut trees =

and red oak trees =

Now as per question,

or,

Therefore together the farm has: