Washed Orange mixing equal amount of orange and white
So, orange:white =1:1
Now orange can form by mixing red and yellow
So, we need to mix red, yellow, white
Again cream can be formed by mixing white:yellow=70:30 =(7/10) : (3/10)
Now we have to mix red so that orange : white =1 :1
So, red will be (7/10) - (3/10) = 4/10
mixture of cream : red =(70:30):40 =(100/140) :(40/140) = 10 : 4