j111111111111111 j111111111111111 24-02-2021 Mathematics contestada White shapes and black shapes are used in a game. Some of the shapes are circles. All the other shapes are squares. 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 number 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.
