14 White shapes and black shapes
Some of the shapes are circles.
All the other shapes are squares
are used is a game
The ratio of the number of white shapes to the number of black shapes is 3:7
The ratio of the number of white circles to the sumber of white squares is 4:5
The ratio of the number of black circles to the number of black squares is 2:5
Work out what fraction of all the shapes are circles.